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DbProviderFactory — провайдер-незалежний код","/csharp/ado-net/provider-factory","01.csharp/09.ado-net/07.provider-factory",{"title":438,"path":439,"stem":440},"9.8. Асинхронний доступ до даних","/csharp/ado-net/async-data-access","01.csharp/09.ado-net/08.async-data-access",{"title":442,"path":443,"stem":444},"9.9. Від'єднаний режим: DataSet, DataTable, DataRow","/csharp/ado-net/disconnected-mode-dataset","01.csharp/09.ado-net/09.disconnected-mode-dataset",{"title":446,"path":447,"stem":448},"9.10. DataAdapter — міст між DataSet та базою даних","/csharp/ado-net/data-adapter","01.csharp/09.ado-net/10.data-adapter",{"title":450,"path":451,"stem":452},"9.11. Data Mapper та Repository: Архітектура доступу до даних","/csharp/ado-net/data-mapper-repository","01.csharp/09.ado-net/11.data-mapper-repository",{"title":454,"path":455,"stem":456},"9.12. Identity Map, Unit of Work та Specification Pattern","/csharp/ado-net/advanced-patterns","01.csharp/09.ado-net/12.advanced-patterns",{"title":458,"icon":255,"path":459,"stem":460,"children":461,"page":59},"Ef Core","/csharp/ef-core","01.csharp/10.ef-core",[462,466,470,474,478,482,486,490,494,498,502,506,510,514,518,522,526,532,538,542,546,550,554,558,562,566,570,574,578,582,586,590,594,598,602,606,610,614,618,622,626,630,634,638,642,646],{"title":463,"path":464,"stem":465},"Що таке ORM? Від SQL до об'єктів","/csharp/ef-core/what-is-orm","01.csharp/10.ef-core/01.what-is-orm",{"title":467,"path":468,"stem":469},"Перший проєкт — від нуля до CRUD","/csharp/ef-core/first-project","01.csharp/10.ef-core/02.first-project",{"title":471,"path":472,"stem":473},"DbContext — Серце EF Core","/csharp/ef-core/dbcontext-deep-dive","01.csharp/10.ef-core/03.dbcontext-deep-dive",{"title":475,"path":476,"stem":477},"Провайдери баз даних — Архітектура та Вибір СУБД","/csharp/ef-core/database-providers","01.csharp/10.ef-core/04.database-providers",{"title":479,"path":480,"stem":481},"Конвенції EF Core — Магія без конфігурації","/csharp/ef-core/conventions","01.csharp/10.ef-core/05.conventions",{"title":483,"path":484,"stem":485},"Fluent API та Data Annotations — Явна конфігурація моделі","/csharp/ef-core/fluent-api-vs-annotations","01.csharp/10.ef-core/06.fluent-api-vs-annotations",{"title":487,"path":488,"stem":489},"Зв'язки — One-to-One та One-to-Many","/csharp/ef-core/relationships-basics","01.csharp/10.ef-core/07.relationships-basics",{"title":491,"path":492,"stem":493},"Зв'язки Advanced — Many-to-Many та Складні Сценарії","/csharp/ef-core/relationships-advanced","01.csharp/10.ef-core/08.relationships-advanced",{"title":495,"path":496,"stem":497},"Властивості — Типи, Конвертери, Компаратори (Частина 1)","/csharp/ef-core/property-configuration-part1","01.csharp/10.ef-core/09.property-configuration-part1",{"title":499,"path":500,"stem":501},"Властивості — Value Comparers, Generators, Shadow Properties (Частина 2)","/csharp/ef-core/property-configuration-part2","01.csharp/10.ef-core/09.property-configuration-part2",{"title":503,"path":504,"stem":505},"Складні типи — Owned Types та Complex Types (Частина 1)","/csharp/ef-core/complex-types-owned-part1","01.csharp/10.ef-core/10.complex-types-owned-part1",{"title":507,"path":508,"stem":509},"Складні типи — Complex Types, Keyless Entities, Порівняння (Частина 2)","/csharp/ef-core/complex-types-owned-part2","01.csharp/10.ef-core/10.complex-types-owned-part2",{"title":511,"path":512,"stem":513},"JSON Columns — Складні дані у JSON (Частина 1)","/csharp/ef-core/json-columns-part1","01.csharp/10.ef-core/11.json-columns-part1",{"title":515,"path":516,"stem":517},"JSON Columns — Value Comparers, Індекси, Провайдери (Частина 2)","/csharp/ef-core/json-columns-part2","01.csharp/10.ef-core/11.json-columns-part2",{"title":519,"path":520,"stem":521},"Успадкування — Абстрактні класи та TPH (Частина 1)","/csharp/ef-core/inheritance-part1","01.csharp/10.ef-core/12.inheritance-part1",{"title":523,"path":524,"stem":525},"Успадкування — TPT, TPC та Порівняння Стратегій (Частина 2)","/csharp/ef-core/inheritance-part2","01.csharp/10.ef-core/12.inheritance-part2",{"title":527,"path":528,"stem":529,"children":530},"Індекси, Обмеження та Схема (Частина 1)","/csharp/ef-core/indexes-constraints-part1","01.csharp/10.ef-core/13.indexes-constraints-part1",[531],{"title":527,"path":528,"stem":529},{"title":533,"path":534,"stem":535,"children":536},"Індекси, Обмеження та Схема (Частина 2)","/csharp/ef-core/indexes-constraints-part2","01.csharp/10.ef-core/13.indexes-constraints-part2",[537],{"title":533,"path":534,"stem":535},{"title":539,"path":540,"stem":541},"Seed Data — Початкові Дані (Частина 1)","/csharp/ef-core/seeding-part1","01.csharp/10.ef-core/14.seeding-part1",{"title":543,"path":544,"stem":545},"Seed Data — SQL-скрипти, Bogus та Стратегії (Частина 2)","/csharp/ef-core/seeding-part2","01.csharp/10.ef-core/14.seeding-part2",{"title":547,"path":548,"stem":549},"Global Query Filters — Глобальні Фільтри (Частина 1)","/csharp/ef-core/global-query-filters-part1","01.csharp/10.ef-core/15.global-query-filters-part1",{"title":551,"path":552,"stem":553},"Global Query Filters — Підводні камені та Інтеграція (Частина 2)","/csharp/ef-core/global-query-filters-part2","01.csharp/10.ef-core/15.global-query-filters-part2",{"title":555,"path":556,"stem":557},"LINQ-запити в EF Core (Частина 1)","/csharp/ef-core/linq-queries-part1","01.csharp/10.ef-core/16.linq-queries-part1",{"title":559,"path":560,"stem":561},"LINQ-запити в EF Core (Частина 2)","/csharp/ef-core/linq-queries-part2","01.csharp/10.ef-core/16.linq-queries-part2",{"title":563,"path":564,"stem":565},"Завантаження Пов'язаних Даних (Частина 1)","/csharp/ef-core/loading-related-data-part1","01.csharp/10.ef-core/17.loading-related-data-part1",{"title":567,"path":568,"stem":569},"Завантаження Пов'язаних Даних (Частина 2)","/csharp/ef-core/loading-related-data-part2","01.csharp/10.ef-core/17.loading-related-data-part2",{"title":571,"path":572,"stem":573},"Raw SQL, Views та Stored Procedures (Частина 1)","/csharp/ef-core/raw-sql-part1","01.csharp/10.ef-core/18.raw-sql-part1",{"title":575,"path":576,"stem":577},"Raw SQL — Stored Procedures, DbFunction та Bulk Operations (Частина 2)","/csharp/ef-core/raw-sql-part2","01.csharp/10.ef-core/18.raw-sql-part2",{"title":579,"path":580,"stem":581},"Продвинуті Запити — Compiled Queries, Bulk та Оптимізація (Частина 1)","/csharp/ef-core/advanced-queries-part1","01.csharp/10.ef-core/19.advanced-queries-part1",{"title":583,"path":584,"stem":585},"Продвинуті Запити — Query Tags, Bulk та Interceptors (Частина 2)","/csharp/ef-core/advanced-queries-part2","01.csharp/10.ef-core/19.advanced-queries-part2",{"title":587,"path":588,"stem":589},"Change Tracker — Відстеження Змін (Частина 1)","/csharp/ef-core/change-tracking-part1","01.csharp/10.ef-core/20.change-tracking-part1",{"title":591,"path":592,"stem":593},"Change Tracker — Графи Об'єктів та Disconnected (Частина 2)","/csharp/ef-core/change-tracking-part2","01.csharp/10.ef-core/20.change-tracking-part2",{"title":595,"path":596,"stem":597},"Збереження Даних та Транзакції (Частина 1)","/csharp/ef-core/saving-data-part1","01.csharp/10.ef-core/21.saving-data-part1",{"title":599,"path":600,"stem":601},"Збереження Даних — Concurrency та Outbox (Частина 2)","/csharp/ef-core/saving-data-part2","01.csharp/10.ef-core/21.saving-data-part2",{"title":603,"path":604,"stem":605},"Конкурентність та Блокування (Частина 1)","/csharp/ef-core/concurrency-part1","01.csharp/10.ef-core/22.concurrency-part1",{"title":607,"path":608,"stem":609},"Конкурентність — Дедлоки та Queue Processing (Частина 2)","/csharp/ef-core/concurrency-part2","01.csharp/10.ef-core/22.concurrency-part2",{"title":611,"path":612,"stem":613},"Міграції в EF Core — Основи (Частина 1)","/csharp/ef-core/migrations-basics-part1","01.csharp/10.ef-core/23.migrations-basics-part1",{"title":615,"path":616,"stem":617},"Міграції в EF Core — Основи (Частина 2)","/csharp/ef-core/migrations-basics-part2","01.csharp/10.ef-core/23.migrations-basics-part2",{"title":619,"path":620,"stem":621},"Міграції — Просунуті Сценарії (Частина 1)","/csharp/ef-core/migrations-advanced-part1","01.csharp/10.ef-core/24.migrations-advanced-part1",{"title":623,"path":624,"stem":625},"Міграції — Просунуті Сценарії (Частина 2)","/csharp/ef-core/migrations-advanced-part2","01.csharp/10.ef-core/24.migrations-advanced-part2",{"title":627,"path":628,"stem":629},"Управління Схемою та Database-First (Частина 1)","/csharp/ef-core/schema-management-part1","01.csharp/10.ef-core/25.schema-management-part1",{"title":631,"path":632,"stem":633},"Управління Схемою та Database-First (Частина 2)","/csharp/ef-core/schema-management-part2","01.csharp/10.ef-core/25.schema-management-part2",{"title":635,"path":636,"stem":637},"Продуктивність EF Core — Основи (Частина 1)","/csharp/ef-core/performance-fundamentals-part1","01.csharp/10.ef-core/26.performance-fundamentals-part1",{"title":639,"path":640,"stem":641},"Interceptors в EF Core (Частина 1)","/csharp/ef-core/interceptors-part1","01.csharp/10.ef-core/29.interceptors-part1",{"title":643,"path":644,"stem":645},"Interceptors в EF Core — Connection, Transaction та Materialization (Частина 2)","/csharp/ef-core/interceptors-part2","01.csharp/10.ef-core/29.interceptors-part2",{"title":647,"path":648,"stem":649},"План вивчення Entity Framework Core — Повний курс","/csharp/ef-core/implementation_plan","01.csharp/10.ef-core/implementation_plan",{"title":651,"icon":652,"path":653,"stem":654,"children":655,"page":59},"ASP.NET","i-devicon-dotnetcore","/csharp/aspnet","01.csharp/11.aspnet",[656,730,791,869,927,941,967,1057,1111,1182,1212,1289],{"title":657,"icon":658,"path":659,"stem":660,"children":661,"page":59},"Minimal API","i-lucide-network","/csharp/aspnet/minimal-api","01.csharp/11.aspnet/01.minimal-api",[662,666,670,674,678,682,686,690,694,698,702,706,710,714,718,722,726],{"title":663,"path":664,"stem":665},"Вступ до ASP.NET та еволюція фреймворку","/csharp/aspnet/minimal-api/introduction","01.csharp/11.aspnet/01.minimal-api/01.introduction",{"title":667,"path":668,"stem":669},"Перший додаток на ASP.NET Core","/csharp/aspnet/minimal-api/first-application","01.csharp/11.aspnet/01.minimal-api/02.first-application",{"title":671,"path":672,"stem":673},"WebApplication, Builder та Dependency Injection","/csharp/aspnet/minimal-api/webapplication-builder","01.csharp/11.aspnet/01.minimal-api/03.webapplication-builder",{"title":675,"path":676,"stem":677},"Конвеєр запитів та Middleware","/csharp/aspnet/minimal-api/request-pipeline-middleware","01.csharp/11.aspnet/01.minimal-api/04.request-pipeline-middleware",{"title":679,"path":680,"stem":681},"Маршрутизація в ASP.NET Core: Основи","/csharp/aspnet/minimal-api/routing-basics","01.csharp/11.aspnet/01.minimal-api/05.routing-basics",{"title":683,"path":684,"stem":685},"Маршрутизація в ASP.NET Core: Розширені можливості","/csharp/aspnet/minimal-api/routing-advanced","01.csharp/11.aspnet/01.minimal-api/06.routing-advanced",{"title":687,"path":688,"stem":689},"Статичні файли в ASP.NET Core","/csharp/aspnet/minimal-api/static-files","01.csharp/11.aspnet/01.minimal-api/07.static-files",{"title":691,"path":692,"stem":693},"Статичні Активи: MapStaticAssets (ASP.NET Core 9.0)","/csharp/aspnet/minimal-api/static-assets","01.csharp/11.aspnet/01.minimal-api/08.static-assets",{"title":695,"path":696,"stem":697},"Конфігурація в ASP.NET Core: Основи","/csharp/aspnet/minimal-api/configuration-fundamentals","01.csharp/11.aspnet/01.minimal-api/09.configuration-fundamentals",{"title":699,"path":700,"stem":701},"Конфігурація: Паттерн Options","/csharp/aspnet/minimal-api/configuration-options","01.csharp/11.aspnet/01.minimal-api/10.configuration-options",{"title":703,"path":704,"stem":705},"Логування в ASP.NET Core: Основи","/csharp/aspnet/minimal-api/logging-basics","01.csharp/11.aspnet/01.minimal-api/11.logging-basics",{"title":707,"path":708,"stem":709},"Логування: Serilog та Middleware","/csharp/aspnet/minimal-api/logging-advanced","01.csharp/11.aspnet/01.minimal-api/12.logging-advanced",{"title":711,"path":712,"stem":713},"Управління станом: HttpContext.Items та Cookies","/csharp/aspnet/minimal-api/state-management","01.csharp/11.aspnet/01.minimal-api/13.state-management",{"title":715,"path":716,"stem":717},"Стан сесії: Sessions","/csharp/aspnet/minimal-api/session-state","01.csharp/11.aspnet/01.minimal-api/14.session-state",{"title":719,"path":720,"stem":721},"Структура проєкту: від хаосу до архітектури","/csharp/aspnet/minimal-api/project-structure","01.csharp/11.aspnet/01.minimal-api/15.project-structure",{"title":723,"path":724,"stem":725},"Scalar у Minimal API: повний проєкт і Fluent OpenAPI","/csharp/aspnet/minimal-api/scalar-openapi-fluent","01.csharp/11.aspnet/01.minimal-api/16.scalar-openapi-fluent",{"title":727,"path":728,"stem":729},"Swagger / Swashbuckle у Minimal API: окремий класичний шлях","/csharp/aspnet/minimal-api/swagger-swashbuckle","01.csharp/11.aspnet/01.minimal-api/17.swagger-swashbuckle",{"title":731,"icon":658,"path":732,"stem":733,"children":734,"page":59},"API","/csharp/aspnet/api","01.csharp/11.aspnet/02.api",[735,739,743,747,751,755,759,763,767,771,775,779,783,787],{"title":736,"path":737,"stem":738},"Що таке API. Клієнт-серверна архітектура","/csharp/aspnet/api/what-is-api","01.csharp/11.aspnet/02.api/01.what-is-api",{"title":740,"path":741,"stem":742},"Формати даних: JSON, XML, TOML та бінарні формати","/csharp/aspnet/api/data-formats","01.csharp/11.aspnet/02.api/02.data-formats",{"title":744,"path":745,"stem":746},"Парадигми API та концепція REST","/csharp/aspnet/api/api-paradigms-rest","01.csharp/11.aspnet/02.api/03.api-paradigms-rest",{"title":748,"path":749,"stem":750},"HTTP-методи, статус-коди та заголовки","/csharp/aspnet/api/http-methods-status-codes","01.csharp/11.aspnet/02.api/04.http-methods-status-codes",{"title":752,"path":753,"stem":754},"Організація HTTP API за принципами REST","/csharp/aspnet/api/rest-organizing","01.csharp/11.aspnet/02.api/05.rest-organizing",{"title":756,"path":757,"stem":758},"Номенклатура URL та CRUD-операції","/csharp/aspnet/api/url-nomenclature-crud","01.csharp/11.aspnet/02.api/06.url-nomenclature-crud",{"title":760,"path":761,"stem":762},"Правила дизайну: іменування та стандарти","/csharp/aspnet/api/api-design-naming","01.csharp/11.aspnet/02.api/07.api-design-naming",{"title":764,"path":765,"stem":766},"Валідація, ліміти та обробка помилок","/csharp/aspnet/api/api-design-validation","01.csharp/11.aspnet/02.api/08.api-design-validation",{"title":768,"path":769,"stem":770},"Обробка помилок у Minimal API","/csharp/aspnet/api/error-handling-http","01.csharp/11.aspnet/02.api/09.error-handling-http",{"title":772,"path":773,"stem":774},"Ідемпотентність та синхронізація стану","/csharp/aspnet/api/idempotency-sync","01.csharp/11.aspnet/02.api/10.idempotency-sync",{"title":776,"path":777,"stem":778},"Пагінація та організація списків","/csharp/aspnet/api/pagination-lists","01.csharp/11.aspnet/02.api/11.pagination-lists",{"title":780,"path":781,"stem":782},"Безпека API, кешування та інтернаціоналізація","/csharp/aspnet/api/security-auth","01.csharp/11.aspnet/02.api/12.security-auth",{"title":784,"path":785,"stem":786},"Процес проєктування API та документування","/csharp/aspnet/api/api-design-process","01.csharp/11.aspnet/02.api/13.api-design-process",{"title":788,"path":789,"stem":790},"OpenAPI: контракт, специфікація та документація API","/csharp/aspnet/api/openapi","01.csharp/11.aspnet/02.api/14.openapi",{"title":792,"icon":793,"path":794,"stem":795,"children":796,"page":59},"Auth","i-lucide-shield-check","/csharp/aspnet/auth","01.csharp/11.aspnet/03.auth",[797,801,805,809,813,817,821,825,829,833,837,841,845,849,853,857,861,865],{"title":798,"path":799,"stem":800},"Основи аутентифікації та авторизації","/csharp/aspnet/auth/auth-fundamentals","01.csharp/11.aspnet/03.auth/01.auth-fundamentals",{"title":802,"path":803,"stem":804},"JWT-аутентифікація","/csharp/aspnet/auth/jwt-authentication","01.csharp/11.aspnet/03.auth/02.jwt-authentication",{"title":806,"path":807,"stem":808},"Авторизація: ролі, політики та resource-based доступ","/csharp/aspnet/auth/authorization-policies","01.csharp/11.aspnet/03.auth/03.authorization-policies",{"title":810,"path":811,"stem":812},"Cookie-аутентифікація та ASP.NET Core Identity","/csharp/aspnet/auth/cookie-auth-identity","01.csharp/11.aspnet/03.auth/04.cookie-auth-identity",{"title":814,"path":815,"stem":816},"JWT + Refresh Tokens (HttpOnly Cookie)","/csharp/aspnet/auth/04b.identity-auth-jwt","01.csharp/11.aspnet/03.auth/04b.identity-auth-jwt",{"title":818,"path":819,"stem":820},"Identity: Підтвердження Email та Скидання Пароля","/csharp/aspnet/auth/identity-email-confirmation","01.csharp/11.aspnet/03.auth/05.identity-email-confirmation",{"title":822,"path":823,"stem":824},"Identity: Двофакторна Аутентифікація (2FA)","/csharp/aspnet/auth/identity-two-factor","01.csharp/11.aspnet/03.auth/06.identity-two-factor",{"title":826,"path":827,"stem":828},"Identity: Внутрішня Архітектура та Кастомізація","/csharp/aspnet/auth/identity-internals","01.csharp/11.aspnet/03.auth/07.identity-internals",{"title":830,"path":831,"stem":832},"OAuth 2.0 та зовнішні провайдери","/csharp/aspnet/auth/oauth-external-providers","01.csharp/11.aspnet/03.auth/08.oauth-external-providers",{"title":834,"path":835,"stem":836},"Безпека на практиці: CORS, HTTPS та захист від атак","/csharp/aspnet/auth/security-hardening","01.csharp/11.aspnet/03.auth/09.security-hardening",{"title":838,"path":839,"stem":840},"Теорія OAuth 2.0: Поняття, Аналогії та Флоу","/csharp/aspnet/auth/oauth-theory","01.csharp/11.aspnet/03.auth/10.oauth-theory",{"title":842,"path":843,"stem":844},"OIDC, OAuth 2.0 та Keycloak в ASP.NET Core","/csharp/aspnet/auth/oidc-keycloak","01.csharp/11.aspnet/03.auth/10.oidc-keycloak",{"title":846,"path":847,"stem":848},"API Keys аутентифікація в ASP.NET Core","/csharp/aspnet/auth/api-keys","01.csharp/11.aspnet/03.auth/11.api-keys",{"title":850,"path":851,"stem":852},"Rate Limiting та Throttling в ASP.NET Core","/csharp/aspnet/auth/rate-limiting","01.csharp/11.aspnet/03.auth/12.rate-limiting",{"title":854,"path":855,"stem":856},"Refresh Token Rotation в ASP.NET Core","/csharp/aspnet/auth/refresh-token-rotation","01.csharp/11.aspnet/03.auth/13.refresh-token-rotation",{"title":858,"path":859,"stem":860},"Certificate Authentication та mTLS в ASP.NET Core","/csharp/aspnet/auth/certificate-auth","01.csharp/11.aspnet/03.auth/14.certificate-auth",{"title":862,"path":863,"stem":864},"RBAC, ABAC та ReBAC в ASP.NET Core","/csharp/aspnet/auth/rbac-abac-rebac","01.csharp/11.aspnet/03.auth/15.rbac-abac-rebac",{"title":866,"path":867,"stem":868},"Multi-tenancy та ізоляція даних в ASP.NET Core","/csharp/aspnet/auth/multi-tenancy","01.csharp/11.aspnet/03.auth/16.multi-tenancy",{"title":870,"icon":871,"path":872,"stem":873,"children":874,"page":59},"Нотифікації","i-lucide-bell","/csharp/aspnet/notifications","01.csharp/11.aspnet/04.notifications",[875,879,883,887,891,895,899,903,907,911,915,919,923],{"title":876,"path":877,"stem":878},"In-App нотифікації через базу даних","/csharp/aspnet/notifications/in-app-database-notifications","01.csharp/11.aspnet/04.notifications/01.in-app-database-notifications",{"title":880,"path":881,"stem":882},"Polling: Регулярний запит оновлень","/csharp/aspnet/notifications/polling","01.csharp/11.aspnet/04.notifications/02.polling",{"title":884,"path":885,"stem":886},"Server-Sent Events: Однострімовий push від сервера","/csharp/aspnet/notifications/server-sent-events","01.csharp/11.aspnet/04.notifications/03.server-sent-events",{"title":888,"path":889,"stem":890},"WebSockets: Двостороннє з'єднання в реальному часі","/csharp/aspnet/notifications/websockets","01.csharp/11.aspnet/04.notifications/04.websockets",{"title":892,"path":893,"stem":894},"SignalR: Абстракція над транспортами реального часу","/csharp/aspnet/notifications/signalr","01.csharp/11.aspnet/04.notifications/05.signalr",{"title":896,"path":897,"stem":898},"Background Services: Фонові задачі в ASP.NET Core","/csharp/aspnet/notifications/background-services","01.csharp/11.aspnet/04.notifications/06.background-services",{"title":900,"path":901,"stem":902},"Web Push нотифікації","/csharp/aspnet/notifications/web-push","01.csharp/11.aspnet/04.notifications/07.web-push",{"title":904,"path":905,"stem":906},"Email нотифікації","/csharp/aspnet/notifications/email-notifications","01.csharp/11.aspnet/04.notifications/08.email-notifications",{"title":908,"path":909,"stem":910},"Порівняння підходів: Як вибрати правильну технологію нотифікацій","/csharp/aspnet/notifications/choosing-the-right-approach","01.csharp/11.aspnet/04.notifications/09.choosing-the-right-approach",{"title":912,"path":913,"stem":914},"Hangfire: Надійне планування фонових задач","/csharp/aspnet/notifications/hangfire","01.csharp/11.aspnet/04.notifications/10.hangfire",{"title":916,"path":917,"stem":918},"Практика: Конвертація зображень у WebP через Hangfire","/csharp/aspnet/notifications/hangfire-image-webp","01.csharp/11.aspnet/04.notifications/11.hangfire-image-webp",{"title":920,"path":921,"stem":922},"Практика: Підготовка відео до HLS-стрімінгу через Hangfire","/csharp/aspnet/notifications/hangfire-video-hls","01.csharp/11.aspnet/04.notifications/12.hangfire-video-hls",{"title":924,"path":925,"stem":926},"Telegram-нотифікації: від одного повідомлення до масових розсилок і мульти-канального підходу","/csharp/aspnet/notifications/telegram-notifications","01.csharp/11.aspnet/04.notifications/13.telegram-notifications",{"title":928,"icon":929,"path":930,"stem":931,"children":932,"page":59},"Інтернаціоналізація","i-lucide-languages","/csharp/aspnet/i18n","01.csharp/11.aspnet/05.i18n",[933,937],{"title":934,"path":935,"stem":936},"Інтернаціоналізація (i18n) у Minimal API: від A до Я","/csharp/aspnet/i18n/internationalization","01.csharp/11.aspnet/05.i18n/01.internationalization",{"title":938,"path":939,"stem":940},"Humanizer: людиномовні рядки у .NET","/csharp/aspnet/i18n/humanizer","01.csharp/11.aspnet/05.i18n/02.humanizer",{"title":942,"icon":943,"path":944,"stem":945,"children":946,"page":59},"Кешування","i-lucide-layers","/csharp/aspnet/caching","01.csharp/11.aspnet/06.caching",[947,951,955,959,963],{"title":948,"path":949,"stem":950},"Огляд кешування: чотири рівні і коли що обирати","/csharp/aspnet/caching/caching","01.csharp/11.aspnet/06.caching/01.caching",{"title":952,"path":953,"stem":954},"IMemoryCache: кеш в оперативній пам'яті","/csharp/aspnet/caching/memory-cache","01.csharp/11.aspnet/06.caching/02.memory-cache",{"title":956,"path":957,"stem":958},"IDistributedCache і Redis: розподілений кеш","/csharp/aspnet/caching/distributed-cache","01.csharp/11.aspnet/06.caching/03.distributed-cache",{"title":960,"path":961,"stem":962},"Response Cache: HTTP-кешування через Cache-Control","/csharp/aspnet/caching/response-cache","01.csharp/11.aspnet/06.caching/04.response-cache",{"title":964,"path":965,"stem":966},"Output Cache: серверний кеш HTTP-відповідей (.NET 7+)","/csharp/aspnet/caching/output-cache","01.csharp/11.aspnet/06.caching/05.output-cache",{"title":968,"icon":969,"path":970,"stem":971,"children":972,"page":59},"Тестування","i-lucide-test-tube","/csharp/aspnet/testing","01.csharp/11.aspnet/07.testing",[973,977,981,985,989,993,997,1001,1005,1009,1013,1017,1021,1025,1029,1033,1037,1041,1045,1049,1053],{"title":974,"path":975,"stem":976},"Що таке тестування? Від інтуїції до науки","/csharp/aspnet/testing/what-is-testing","01.csharp/11.aspnet/07.testing/01.what-is-testing",{"title":978,"path":979,"stem":980},"Піраміда тестування — Стратегія, а не Догма","/csharp/aspnet/testing/testing-pyramid","01.csharp/11.aspnet/07.testing/02.testing-pyramid",{"title":982,"path":983,"stem":984},"Дві Школи Тестування — Лондон проти Детройту","/csharp/aspnet/testing/testing-schools","01.csharp/11.aspnet/07.testing/03.testing-schools",{"title":986,"path":987,"stem":988},"TDD та BDD — Тести як Дизайн-інструмент","/csharp/aspnet/testing/tdd-and-bdd","01.csharp/11.aspnet/07.testing/04.tdd-and-bdd",{"title":990,"path":991,"stem":992},"Що саме тестувати — Техніки аналізу та Циклomatична складність","/csharp/aspnet/testing/what-to-test","01.csharp/11.aspnet/07.testing/05.what-to-test",{"title":994,"path":995,"stem":996},"Тестові Фреймворки — Навіщо вони і що всередині","/csharp/aspnet/testing/test-frameworks","01.csharp/11.aspnet/07.testing/06.test-frameworks",{"title":998,"path":999,"stem":1000},"xUnit — Факти, Теорії та Lifecycle тестів","/csharp/aspnet/testing/xunit-basics","01.csharp/11.aspnet/07.testing/07.xunit-basics",{"title":1002,"path":1003,"stem":1004},"xUnit Advanced — Fixtures, Кастомізація та Розширення","/csharp/aspnet/testing/xunit-advanced","01.csharp/11.aspnet/07.testing/08.xunit-advanced",{"title":1006,"path":1007,"stem":1008},"Moq — Глибоке занурення в мокування","/csharp/aspnet/testing/mocking-with-moq","01.csharp/11.aspnet/07.testing/09.mocking-with-moq",{"title":1010,"path":1011,"stem":1012},"Тестування Баз Даних — EF Core, SQLite та Testcontainers","/csharp/aspnet/testing/database-testing","01.csharp/11.aspnet/07.testing/10.database-testing",{"title":1014,"path":1015,"stem":1016},"Integration Testing — Частина 1 [Теорія та WebApplicationFactory]","/csharp/aspnet/testing/integration-testing","01.csharp/11.aspnet/07.testing/11.integration-testing",{"title":1018,"path":1019,"stem":1020},"Інтеграційне тестування — Практика","/csharp/aspnet/testing/11a.integration-testing-practice","01.csharp/11.aspnet/07.testing/11a.integration-testing-practice",{"title":1022,"path":1023,"stem":1024},"Integration Testing — Частина 2 [Просунуті Сценарії та Testcontainers]","/csharp/aspnet/testing/integration-testing-advanced","01.csharp/11.aspnet/07.testing/12.integration-testing-advanced",{"title":1026,"path":1027,"stem":1028},"Професійний Postman: Колекції, Змінні та GitHub Інтеграція","/csharp/aspnet/testing/postman-professional","01.csharp/11.aspnet/07.testing/13.postman-professional",{"title":1030,"path":1031,"stem":1032},"HttpClient у Тестах Частина 1: Архітектура та MockHttpMessageHandler","/csharp/aspnet/testing/httpclient-testing","01.csharp/11.aspnet/07.testing/14.httpclient-testing",{"title":1034,"path":1035,"stem":1036},"HttpClient у Тестах Частина 2: WireMock.Net та Resilience","/csharp/aspnet/testing/wiremock-net","01.csharp/11.aspnet/07.testing/15.wiremock-net",{"title":1038,"path":1039,"stem":1040},"Патерни та Анти-патерни Тестування: Test Smells","/csharp/aspnet/testing/testing-patterns","01.csharp/11.aspnet/07.testing/16.testing-patterns",{"title":1042,"path":1043,"stem":1044},"Просунуті інструменти: Time, Snapshots та Властивості","/csharp/aspnet/testing/advanced-testing-tools","01.csharp/11.aspnet/07.testing/17.advanced-testing-tools",{"title":1046,"path":1047,"stem":1048},"Тестування Архітектури з NetArchTest","/csharp/aspnet/testing/architecture-testing","01.csharp/11.aspnet/07.testing/18.architecture-testing",{"title":1050,"path":1051,"stem":1052},"Тестування Продуктивності: BenchmarkDotNet, NBomber та k6","/csharp/aspnet/testing/performance-testing","01.csharp/11.aspnet/07.testing/19.performance-testing",{"title":1054,"path":1055,"stem":1056},"Залишок плану для курсу \"Тестування ASP.NET Minimal API\"","/csharp/aspnet/testing/remaining_plan","01.csharp/11.aspnet/07.testing/remaining_plan",{"title":1058,"icon":1059,"path":1060,"stem":1061,"children":1062,"page":59},"Платежі","i-lucide-credit-card","/csharp/aspnet/payments","01.csharp/11.aspnet/08.payments",[1063,1067,1071,1075,1079,1083,1087,1091,1095,1099,1103,1107],{"title":1064,"path":1065,"stem":1066},"Основи платіжної інфраструктури","/csharp/aspnet/payments/payment-fundamentals","01.csharp/11.aspnet/08.payments/01.payment-fundamentals",{"title":1068,"path":1069,"stem":1070},"Методи оплати в Україні","/csharp/aspnet/payments/payment-methods-ukraine","01.csharp/11.aspnet/08.payments/02.payment-methods-ukraine",{"title":1072,"path":1073,"stem":1074},"PCI DSS та безпека платежів","/csharp/aspnet/payments/pci-dss-security","01.csharp/11.aspnet/08.payments/03.pci-dss-security",{"title":1076,"path":1077,"stem":1078},"Архітектура платіжної підсистеми","/csharp/aspnet/payments/payment-architecture","01.csharp/11.aspnet/08.payments/04.payment-architecture",{"title":1080,"path":1081,"stem":1082},"Інтеграція LiqPay (ПриватБанк)","/csharp/aspnet/payments/liqpay-integration","01.csharp/11.aspnet/08.payments/05.liqpay-integration",{"title":1084,"path":1085,"stem":1086},"Інтеграція Monobank Acquiring API","/csharp/aspnet/payments/monobank-acquiring","01.csharp/11.aspnet/08.payments/06.monobank-acquiring",{"title":1088,"path":1089,"stem":1090},"Інтеграція Stripe","/csharp/aspnet/payments/stripe-integration","01.csharp/11.aspnet/08.payments/07.stripe-integration",{"title":1092,"path":1093,"stem":1094},"Webhooks — глибоке занурення","/csharp/aspnet/payments/webhooks-deep-dive","01.csharp/11.aspnet/08.payments/08.webhooks-deep-dive",{"title":1096,"path":1097,"stem":1098},"Підписки та рекурентні платежі","/csharp/aspnet/payments/subscriptions-recurring","01.csharp/11.aspnet/08.payments/09.subscriptions-recurring",{"title":1100,"path":1101,"stem":1102},"Повернення коштів та диспути","/csharp/aspnet/payments/refunds-disputes","01.csharp/11.aspnet/08.payments/10.refunds-disputes",{"title":1104,"path":1105,"stem":1106},"Тестування платіжних інтеграцій","/csharp/aspnet/payments/testing-payments","01.csharp/11.aspnet/08.payments/11.testing-payments",{"title":1108,"path":1109,"stem":1110},"Чекліст виходу в Production","/csharp/aspnet/payments/production-checklist","01.csharp/11.aspnet/08.payments/12.production-checklist",{"title":1112,"icon":1113,"items":1114,"path":1127,"stem":1128,"children":1129,"page":59},"Популярні бібліотеки","lucide:box",[1115,1116,1117,1118,1119,1120,1121,1122,1123,1124,1125,1126],"01.fluent-validation","02.mapster","03.erroror-result-pattern","04.serilog","05.mediatr","06.polly","07.health-checks","08.feature-management","09.fluent-email","10.quest-pdf","11.bogus","12.humanizer-guard","/csharp/aspnet/libraries","01.csharp/11.aspnet/09.libraries",[1130,1134,1138,1142,1146,1150,1154,1158,1162,1166,1170,1174,1178],{"title":1131,"path":1132,"stem":1133},"Валідація з FluentValidation в ASP.NET Core","/csharp/aspnet/libraries/fluent-validation","01.csharp/11.aspnet/09.libraries/01.fluent-validation",{"title":1135,"path":1136,"stem":1137},"Маппінг об","/csharp/aspnet/libraries/mapster","01.csharp/11.aspnet/09.libraries/02.mapster",{"title":1139,"path":1140,"stem":1141},"Обробка помилок з ErrorOr та Result Pattern в ASP.NET Core","/csharp/aspnet/libraries/erroror-result-pattern","01.csharp/11.aspnet/09.libraries/03.erroror-result-pattern",{"title":1143,"path":1144,"stem":1145},"Структуроване логування з Serilog в ASP.NET Core","/csharp/aspnet/libraries/serilog","01.csharp/11.aspnet/09.libraries/04.serilog",{"title":1147,"path":1148,"stem":1149},"CQRS та Mediator з MediatR в ASP.NET Core","/csharp/aspnet/libraries/mediatr","01.csharp/11.aspnet/09.libraries/05.mediatr",{"title":1151,"path":1152,"stem":1153},"Відмовостійкість з Polly в ASP.NET Core","/csharp/aspnet/libraries/polly","01.csharp/11.aspnet/09.libraries/06.polly",{"title":1155,"path":1156,"stem":1157},"Health Checks в ASP.NET Core","/csharp/aspnet/libraries/health-checks","01.csharp/11.aspnet/09.libraries/07.health-checks",{"title":1159,"path":1160,"stem":1161},"Feature Management та Feature Flags в ASP.NET Core","/csharp/aspnet/libraries/feature-management","01.csharp/11.aspnet/09.libraries/08.feature-management",{"title":1163,"path":1164,"stem":1165},"Відправка Email з FluentEmail в ASP.NET Core","/csharp/aspnet/libraries/fluent-email","01.csharp/11.aspnet/09.libraries/09.fluent-email",{"title":1167,"path":1168,"stem":1169},"Генерація PDF з QuestPDF в ASP.NET Core","/csharp/aspnet/libraries/quest-pdf","01.csharp/11.aspnet/09.libraries/10.quest-pdf",{"title":1171,"path":1172,"stem":1173},"Генерація тестових даних з Bogus в ASP.NET Core","/csharp/aspnet/libraries/bogus","01.csharp/11.aspnet/09.libraries/11.bogus",{"title":1175,"path":1176,"stem":1177},"Humanizer та Guard Clauses в ASP.NET Core","/csharp/aspnet/libraries/humanizer-guard","01.csharp/11.aspnet/09.libraries/12.humanizer-guard",{"title":1179,"path":1180,"stem":1181},"План модуля 10.libraries — Популярні бібліотеки ASP.NET","/csharp/aspnet/libraries/plan","01.csharp/11.aspnet/09.libraries/plan",{"title":1183,"icon":1184,"path":1185,"stem":1186,"children":1187,"page":59},"Razor Pages","i-lucide-layout-template","/csharp/aspnet/razor-pages","01.csharp/11.aspnet/10.razor-pages",[1188,1192,1196,1200,1204,1208],{"title":1189,"path":1190,"stem":1191},"Від Minimal API до Razor Pages: концептуальний перехід","/csharp/aspnet/razor-pages/from-minimal-api","01.csharp/11.aspnet/10.razor-pages/01.from-minimal-api",{"title":1193,"path":1194,"stem":1195},"PageModel: логіка сторінки Razor Pages","/csharp/aspnet/razor-pages/page-model","01.csharp/11.aspnet/10.razor-pages/02.page-model",{"title":1197,"path":1198,"stem":1199},"Razor синтаксис: шаблонізатор у .cshtml","/csharp/aspnet/razor-pages/razor-syntax","01.csharp/11.aspnet/10.razor-pages/03.razor-syntax",{"title":1201,"path":1202,"stem":1203},"Tag Helpers: типізований HTML","/csharp/aspnet/razor-pages/tag-helpers","01.csharp/11.aspnet/10.razor-pages/04.tag-helpers",{"title":1205,"path":1206,"stem":1207},"Форми і валідація: повний цикл обробки даних","/csharp/aspnet/razor-pages/forms-validation","01.csharp/11.aspnet/10.razor-pages/05.forms-validation",{"title":1209,"path":1210,"stem":1211},"Практичний проєкт: TaskManager на Razor Pages","/csharp/aspnet/razor-pages/project-task-manager","01.csharp/11.aspnet/10.razor-pages/06.project-task-manager",{"title":1213,"path":1214,"stem":1215,"children":1216,"page":59},"ASP.NET Core MVC","/csharp/aspnet/mvc","01.csharp/11.aspnet/11.mvc",[1217,1221,1225,1229,1233,1237,1241,1245,1249,1253,1257,1261,1265,1269,1273,1277,1281,1285],{"title":1218,"path":1219,"stem":1220},"Патерн MVC: архітектура, що змінила веб","/csharp/aspnet/mvc/mvc-pattern","01.csharp/11.aspnet/11.mvc/01.mvc-pattern",{"title":1222,"path":1223,"stem":1224},"Від Razor Pages до MVC: концептуальний перехід","/csharp/aspnet/mvc/from-razor-pages","01.csharp/11.aspnet/11.mvc/02.from-razor-pages",{"title":1226,"path":1227,"stem":1228},"Controllers та Actions: серце MVC","/csharp/aspnet/mvc/controllers-actions","01.csharp/11.aspnet/11.mvc/03.controllers-actions",{"title":1230,"path":1231,"stem":1232},"Маршрутизація в MVC: Convention vs Attribute Routing","/csharp/aspnet/mvc/routing-mvc","01.csharp/11.aspnet/11.mvc/04.routing-mvc",{"title":1234,"path":1235,"stem":1236},"Model Binding: від HTTP до C#","/csharp/aspnet/mvc/model-binding","01.csharp/11.aspnet/11.mvc/05.model-binding",{"title":1238,"path":1239,"stem":1240},"Views, ViewData, ViewBag, TempData і ViewModel","/csharp/aspnet/mvc/views-viewdata-tempdata","01.csharp/11.aspnet/11.mvc/06.views-viewdata-tempdata",{"title":1242,"path":1243,"stem":1244},"Filters: аспектно-орієнтоване програмування в MVC","/csharp/aspnet/mvc/filters","01.csharp/11.aspnet/11.mvc/07.filters",{"title":1246,"path":1247,"stem":1248},"Areas: структурування великих застосунків","/csharp/aspnet/mvc/areas","01.csharp/11.aspnet/11.mvc/08.areas",{"title":1250,"path":1251,"stem":1252},"View Components: повторювані незалежні блоки UI","/csharp/aspnet/mvc/view-components","01.csharp/11.aspnet/11.mvc/09.view-components",{"title":1254,"path":1255,"stem":1256},"Display та Editor Templates","/csharp/aspnet/mvc/display-editor-templates","01.csharp/11.aspnet/11.mvc/10.display-editor-templates",{"title":1258,"path":1259,"stem":1260},"Валідація: IValidatableObject та FluentValidation","/csharp/aspnet/mvc/validation-advanced","01.csharp/11.aspnet/11.mvc/11.validation-advanced",{"title":1262,"path":1263,"stem":1264},"HTMX: інтерактивність через HTML-атрибути","/csharp/aspnet/mvc/htmx","01.csharp/11.aspnet/11.mvc/12.htmx",{"title":1266,"path":1267,"stem":1268},"HTMX у ASP.NET Core MVC: серверна інтеграція","/csharp/aspnet/mvc/ajax-htmx-mvc","01.csharp/11.aspnet/11.mvc/13.ajax-htmx-mvc",{"title":1270,"path":1271,"stem":1272},"Практичний проєкт: Каталог товарів з HTMX","/csharp/aspnet/mvc/htmx-project","01.csharp/11.aspnet/11.mvc/14.htmx-project",{"title":1274,"path":1275,"stem":1276},"Завантаження та обробка файлів","/csharp/aspnet/mvc/file-upload","01.csharp/11.aspnet/11.mvc/15.file-upload",{"title":1278,"path":1279,"stem":1280},"Глобалізація та Локалізація MVC","/csharp/aspnet/mvc/globalization-localization","01.csharp/11.aspnet/11.mvc/16.globalization-localization",{"title":1282,"path":1283,"stem":1284},"Підсумковий проєкт: Блог-платформа","/csharp/aspnet/mvc/mvc-project","01.csharp/11.aspnet/11.mvc/17.mvc-project",{"title":1286,"path":1287,"stem":1288},"План курсу: ASP.NET Core MVC","/csharp/aspnet/mvc/plan","01.csharp/11.aspnet/11.mvc/plan",{"title":1290,"path":1291,"stem":1292,"children":1293,"page":59},"Web Api","/csharp/aspnet/web-api","01.csharp/11.aspnet/12.web-api",[1294,1298,1302,1306,1310,1314,1318,1322,1326,1330,1334,1338,1342],{"title":1295,"path":1296,"stem":1297},"Від Minimal API до Controller-based API","/csharp/aspnet/web-api/from-minimal-api-to-controllers","01.csharp/11.aspnet/12.web-api/01.from-minimal-api-to-controllers",{"title":1299,"path":1300,"stem":1301},"ControllerBase, ActionResult\u003CT> та Response Types","/csharp/aspnet/web-api/controller-base-actionresult","01.csharp/11.aspnet/12.web-api/02.controller-base-actionresult",{"title":1303,"path":1304,"stem":1305},"Content Negotiation - JSON, XML та власні форматери","/csharp/aspnet/web-api/content-negotiation","01.csharp/11.aspnet/12.web-api/03.content-negotiation",{"title":1307,"path":1308,"stem":1309},"Версіонування API","/csharp/aspnet/web-api/api-versioning","01.csharp/11.aspnet/12.web-api/04.api-versioning",{"title":1311,"path":1312,"stem":1313},"ProblemDetails та структурована обробка помилок","/csharp/aspnet/web-api/problemdetails-error-handling","01.csharp/11.aspnet/12.web-api/05.problemdetails-error-handling",{"title":1315,"path":1316,"stem":1317},"Фільтри у Web API контексті","/csharp/aspnet/web-api/filters-for-api","01.csharp/11.aspnet/12.web-api/06.filters-for-api",{"title":1319,"path":1320,"stem":1321},"Пагінація, фільтрація та сортування","/csharp/aspnet/web-api/pagination-filtering-sorting","01.csharp/11.aspnet/12.web-api/07.pagination-filtering-sorting",{"title":1323,"path":1324,"stem":1325},"HATEOAS та Resource Expansion","/csharp/aspnet/web-api/hateoas-resource-expansion","01.csharp/11.aspnet/12.web-api/08.hateoas-resource-expansion",{"title":1327,"path":1328,"stem":1329},"Гібридна архітектура - Minimal API + Controllers","/csharp/aspnet/web-api/minimal-api-vs-controllers-hybrid","01.csharp/11.aspnet/12.web-api/09.minimal-api-vs-controllers-hybrid",{"title":1331,"path":1332,"stem":1333},"Документація API - Swashbuckle, NSwag та генерація клієнтів","/csharp/aspnet/web-api/api-documentation-generation","01.csharp/11.aspnet/12.web-api/10.api-documentation-generation",{"title":1335,"path":1336,"stem":1337},"Health Checks та моніторинг API","/csharp/aspnet/web-api/health-checks-monitoring","01.csharp/11.aspnet/12.web-api/11.health-checks-monitoring",{"title":1339,"path":1340,"stem":1341},"Підсумковий проєкт - Production-Ready REST API","/csharp/aspnet/web-api/web-api-project","01.csharp/11.aspnet/12.web-api/12.web-api-project",{"title":1343,"path":1344,"stem":1345},"План курсу: ASP.NET Core Web API (Controllers)","/csharp/aspnet/web-api/plan","01.csharp/11.aspnet/12.web-api/plan",{"title":1347,"icon":1348,"path":1349,"stem":1350,"children":1351,"page":59},"Desktop UI","i-lucide-app-window","/csharp/desktop-ui","01.csharp/12.desktop-ui",[1352,1356,1360,1364,1368,1372,1376,1380,1384,1388,1392,1396,1400,1404,1408,1412,1416,1420,1424,1428,1432,1436,1440,1444,1448,1452,1456,1460,1464,1468,1472,1476,1480,1484,1488,1492,1496,1500,1504,1508,1512,1516,1520,1524,1528,1532,1536,1540,1544,1548,1552,1556,1560,1564,1568,1572,1576,1580,1584,1588,1592,1596,1600,1604,1608,1612,1616,1620,1624,1628,1632],{"title":1353,"path":1354,"stem":1355},"Що таке десктопна розробка?","/csharp/desktop-ui/what-is-desktop-dev","01.csharp/12.desktop-ui/01.what-is-desktop-dev",{"title":1357,"path":1358,"stem":1359},"Архітектура WPF — як влаштований графічний інтерфейс","/csharp/desktop-ui/wpf-architecture","01.csharp/12.desktop-ui/02.wpf-architecture",{"title":1361,"path":1362,"stem":1363},"Перший WPF-проєкт — від нуля до вікна","/csharp/desktop-ui/first-wpf-app","01.csharp/12.desktop-ui/03.first-wpf-app",{"title":1365,"path":1366,"stem":1367},"Перший Avalonia-проєкт: WPF для всіх платформ","/csharp/desktop-ui/03a.first-avalonia-app","01.csharp/12.desktop-ui/03a.first-avalonia-app",{"title":1369,"path":1370,"stem":1371},"XAML: декларативний інтерфейс","/csharp/desktop-ui/xaml-basics","01.csharp/12.desktop-ui/04.xaml-basics",{"title":1373,"path":1374,"stem":1375},"Fluent UI у WPF — сучасний дизайн Windows 11","/csharp/desktop-ui/04a.wpf-fluent-ui","01.csharp/12.desktop-ui/04a.wpf-fluent-ui",{"title":1377,"path":1378,"stem":1379},"WPF UI — сучасна бібліотека Fluent контролів","/csharp/desktop-ui/04b.wpf-ui-library","01.csharp/12.desktop-ui/04b.wpf-ui-library",{"title":1381,"path":1382,"stem":1383},"HandyControl — велика бібліотека UI контролів для WPF","/csharp/desktop-ui/04c.handycontrol-library","01.csharp/12.desktop-ui/04c.handycontrol-library",{"title":1385,"path":1386,"stem":1387},"Простори імен та ресурси XAML","/csharp/desktop-ui/xaml-namespaces-resources","01.csharp/12.desktop-ui/05.xaml-namespaces-resources",{"title":1389,"path":1390,"stem":1391},"XAML в Avalonia: ключові відмінності від WPF","/csharp/desktop-ui/05a.avalonia-xaml-differences","01.csharp/12.desktop-ui/05a.avalonia-xaml-differences",{"title":1393,"path":1394,"stem":1395},"Розширення розмітки XAML (Markup Extensions)","/csharp/desktop-ui/xaml-markup-extensions","01.csharp/12.desktop-ui/06.xaml-markup-extensions",{"title":1397,"path":1398,"stem":1399},"Панелі Layout: StackPanel, WrapPanel, DockPanel","/csharp/desktop-ui/layout-panels-part1","01.csharp/12.desktop-ui/07.layout-panels-part1",{"title":1401,"path":1402,"stem":1403},"Grid, Canvas, UniformGrid","/csharp/desktop-ui/layout-panels-part2","01.csharp/12.desktop-ui/07.layout-panels-part2",{"title":1405,"path":1406,"stem":1407},"Просунуті техніки Layout","/csharp/desktop-ui/layout-advanced","01.csharp/12.desktop-ui/08.layout-advanced",{"title":1409,"path":1410,"stem":1411},"Адаптивний Layout та найкращі практики","/csharp/desktop-ui/layout-responsive","01.csharp/12.desktop-ui/09.layout-responsive",{"title":1413,"path":1414,"stem":1415},"Layout в Avalonia: відмінності та нові можливості","/csharp/desktop-ui/09a.layout-avalonia","01.csharp/12.desktop-ui/09a.layout-avalonia",{"title":1417,"path":1418,"stem":1419},"Button, Image, ProgressBar та інші базові контроли","/csharp/desktop-ui/basic-controls","01.csharp/12.desktop-ui/10.basic-controls",{"title":1421,"path":1422,"stem":1423},"Контроли в Avalonia: відмінності від WPF","/csharp/desktop-ui/10a.controls-avalonia","01.csharp/12.desktop-ui/10a.controls-avalonia",{"title":1425,"path":1426,"stem":1427},"Текстові контроли — TextBlock, TextBox, RichTextBox","/csharp/desktop-ui/text-controls","01.csharp/12.desktop-ui/11.text-controls",{"title":1429,"path":1430,"stem":1431},"Контроли вибору — CheckBox, RadioButton, ComboBox, ListBox, DatePicker","/csharp/desktop-ui/selection-controls","01.csharp/12.desktop-ui/12.selection-controls",{"title":1433,"path":1434,"stem":1435},"Content Model — GroupBox, Expander, TabControl, StatusBar","/csharp/desktop-ui/content-controls","01.csharp/12.desktop-ui/13.content-controls",{"title":1437,"path":1438,"stem":1439},"UI/UX принципи десктопних застосунків","/csharp/desktop-ui/13a.ui-ux-principles","01.csharp/12.desktop-ui/13a.ui-ux-principles",{"title":1441,"path":1442,"stem":1443},"Dependency Properties — Концепція та Value Resolution","/csharp/desktop-ui/dependency-properties-part1","01.csharp/12.desktop-ui/14.dependency-properties-part1",{"title":1445,"path":1446,"stem":1447},"Avalonia Property System — StyledProperty та DirectProperty","/csharp/desktop-ui/14a.avalonia-property-system","01.csharp/12.desktop-ui/14a.avalonia-property-system",{"title":1449,"path":1450,"stem":1451},"Attached Properties — Властивості без меж","/csharp/desktop-ui/attached-properties","01.csharp/12.desktop-ui/15.attached-properties",{"title":1453,"path":1454,"stem":1455},"Routed Events — Маршрутизація подій у WPF","/csharp/desktop-ui/routed-events","01.csharp/12.desktop-ui/16.routed-events",{"title":1457,"path":1458,"stem":1459},"Data Binding — Від Code-Behind до Декларативності","/csharp/desktop-ui/data-binding-basics-part1","01.csharp/12.desktop-ui/17.data-binding-basics-part1",{"title":1461,"path":1462,"stem":1463},"INotifyPropertyChanged — Живе оновлення UI","/csharp/desktop-ui/data-binding-basics-part2","01.csharp/12.desktop-ui/17.data-binding-basics-part2",{"title":1465,"path":1466,"stem":1467},"Compiled Bindings в Avalonia — Безпека на етапі компіляції","/csharp/desktop-ui/17a.avalonia-compiled-bindings","01.csharp/12.desktop-ui/17a.avalonia-compiled-bindings",{"title":1469,"path":1470,"stem":1471},"Просунутий Data Binding — ElementName, RelativeSource, MultiBinding","/csharp/desktop-ui/data-binding-advanced","01.csharp/12.desktop-ui/18.data-binding-advanced",{"title":1473,"path":1474,"stem":1475},"Value Converters — Перетворення типів даних у Data Binding","/csharp/desktop-ui/value-converters","01.csharp/12.desktop-ui/19.value-converters",{"title":1477,"path":1478,"stem":1479},"Data Templates — Візуалізація об'єктів у WPF","/csharp/desktop-ui/data-templates","01.csharp/12.desktop-ui/20.data-templates",{"title":1481,"path":1482,"stem":1483},"Collections Binding Part 1 — ObservableCollection та ItemsControl","/csharp/desktop-ui/collections-binding-part1","01.csharp/12.desktop-ui/21.collections-binding-part1",{"title":1485,"path":1486,"stem":1487},"Collections Binding Part 2 — ICollectionView, Filtering, Sorting та Virtualization","/csharp/desktop-ui/collections-binding-part2","01.csharp/12.desktop-ui/21.collections-binding-part2",{"title":1489,"path":1490,"stem":1491},"MVVM Pattern — Від Spaghetti Code до архітектури","/csharp/desktop-ui/mvvm-pattern","01.csharp/12.desktop-ui/22.mvvm-pattern",{"title":1493,"path":1494,"stem":1495},"ViewModel Implementation — Від BaseViewModel до валідації","/csharp/desktop-ui/viewmodel-implementation","01.csharp/12.desktop-ui/23.viewmodel-implementation",{"title":1497,"path":1498,"stem":1499},"Commands — Від event handlers до декларативних команд","/csharp/desktop-ui/commands","01.csharp/12.desktop-ui/24.commands",{"title":1501,"path":1502,"stem":1503},"MVVM Toolkit — MVVM без boilerplate через Source Generators","/csharp/desktop-ui/mvvm-toolkit","01.csharp/12.desktop-ui/25.mvvm-toolkit",{"title":1505,"path":1506,"stem":1507},"Messenger Pattern — Комунікація між ViewModel без прямих посилань","/csharp/desktop-ui/messenger-pattern","01.csharp/12.desktop-ui/26.messenger-pattern",{"title":1509,"path":1510,"stem":1511},"Стилі WPF — CSS для десктопу","/csharp/desktop-ui/styles-basics","01.csharp/12.desktop-ui/27.styles-basics",{"title":1513,"path":1514,"stem":1515},"CSS-like стилі Avalonia","/csharp/desktop-ui/27a.avalonia-css-styling","01.csharp/12.desktop-ui/27a.avalonia-css-styling",{"title":1517,"path":1518,"stem":1519},"Control Templates — Частина 1. Концепція та TemplateBinding","/csharp/desktop-ui/control-templates-part1","01.csharp/12.desktop-ui/28.control-templates-part1",{"title":1521,"path":1522,"stem":1523},"Control Templates — Частина 2. Named Parts та ContentPresenter","/csharp/desktop-ui/control-templates-part2","01.csharp/12.desktop-ui/28.control-templates-part2",{"title":1525,"path":1526,"stem":1527},"Control Themes в Avalonia — нова ера стилізації","/csharp/desktop-ui/28a.avalonia-control-themes","01.csharp/12.desktop-ui/28a.avalonia-control-themes",{"title":1529,"path":1530,"stem":1531},"Triggers та Visual State Manager у WPF","/csharp/desktop-ui/triggers-visual-states","01.csharp/12.desktop-ui/29.triggers-visual-states",{"title":1533,"path":1534,"stem":1535},"Pseudo-classes в Avalonia — замість WPF Triggers","/csharp/desktop-ui/29a.avalonia-pseudo-classes","01.csharp/12.desktop-ui/29a.avalonia-pseudo-classes",{"title":1537,"path":1538,"stem":1539},"Теми та ресурсні словники у WPF","/csharp/desktop-ui/resources-themes","01.csharp/12.desktop-ui/30.resources-themes",{"title":1541,"path":1542,"stem":1543},"Avalonia Themes — Fluent Design та система тематизації","/csharp/desktop-ui/30a.avalonia-themes-fluent","01.csharp/12.desktop-ui/30a.avalonia-themes-fluent",{"title":1545,"path":1546,"stem":1547},"Контроли колекцій — глибоке занурення","/csharp/desktop-ui/collection-controls","01.csharp/12.desktop-ui/31.collection-controls",{"title":1549,"path":1550,"stem":1551},"DataGrid — колонки та базове відображення","/csharp/desktop-ui/datagrid-part1","01.csharp/12.desktop-ui/32.datagrid-part1",{"title":1553,"path":1554,"stem":1555},"DataGrid — сортування, фільтрація, редагування","/csharp/desktop-ui/datagrid-part2","01.csharp/12.desktop-ui/32.datagrid-part2",{"title":1557,"path":1558,"stem":1559},"TreeView та GridView","/csharp/desktop-ui/treeview-listview","01.csharp/12.desktop-ui/33.treeview-listview",{"title":1561,"path":1562,"stem":1563},"Меню, Toolbar, ContextMenu, StatusBar","/csharp/desktop-ui/menus-toolbars","01.csharp/12.desktop-ui/34.menus-toolbars",{"title":1565,"path":1566,"stem":1567},"Навігація та керування вікнами. Частина 1: вікна та сторінки","/csharp/desktop-ui/navigation-windows-part1","01.csharp/12.desktop-ui/35.navigation-windows-part1",{"title":1569,"path":1570,"stem":1571},"Навігація та керування вікнами. Частина 2: MVVM-навігація","/csharp/desktop-ui/navigation-windows-part2","01.csharp/12.desktop-ui/35.navigation-windows-part2",{"title":1573,"path":1574,"stem":1575},"Avalonia — Навігація та діалоги","/csharp/desktop-ui/35a.avalonia-navigation-dialogs","01.csharp/12.desktop-ui/35a.avalonia-navigation-dialogs",{"title":1577,"path":1578,"stem":1579},"Діалоги та File Pickers у WPF","/csharp/desktop-ui/dialogs-file-pickers","01.csharp/12.desktop-ui/36.dialogs-file-pickers",{"title":1581,"path":1582,"stem":1583},"UserControl: компонентний підхід у WPF","/csharp/desktop-ui/user-controls","01.csharp/12.desktop-ui/37.user-controls",{"title":1585,"path":1586,"stem":1587},"Custom Controls: Lookless Controls у WPF","/csharp/desktop-ui/custom-controls","01.csharp/12.desktop-ui/38.custom-controls",{"title":1589,"path":1590,"stem":1591},"Avalonia TemplatedControl — Lookless Controls","/csharp/desktop-ui/38a.avalonia-templated-controls","01.csharp/12.desktop-ui/38a.avalonia-templated-controls",{"title":1593,"path":1594,"stem":1595},"Анімації у WPF: Storyboard та Easing Functions","/csharp/desktop-ui/animations-transitions","01.csharp/12.desktop-ui/39.animations-transitions",{"title":1597,"path":1598,"stem":1599},"Анімації в Avalonia","/csharp/desktop-ui/39a.avalonia-animations","01.csharp/12.desktop-ui/39a.avalonia-animations",{"title":1601,"path":1602,"stem":1603},"2D Графіка та Мультимедіа у WPF","/csharp/desktop-ui/media-graphics","01.csharp/12.desktop-ui/40.media-graphics",{"title":1605,"path":1606,"stem":1607},"Dependency Injection у WPF та Avalonia","/csharp/desktop-ui/di-integration","01.csharp/12.desktop-ui/41.di-integration",{"title":1609,"path":1610,"stem":1611},"SQLite та EF Core у десктопних додатках","/csharp/desktop-ui/data-persistence-part1","01.csharp/12.desktop-ui/42.data-persistence-part1",{"title":1613,"path":1614,"stem":1615},"Repository Pattern та Unit of Work","/csharp/desktop-ui/data-persistence-part2","01.csharp/12.desktop-ui/43.data-persistence-part2",{"title":1617,"path":1618,"stem":1619},"Тестування ViewModels","/csharp/desktop-ui/viewmodel-testing","01.csharp/12.desktop-ui/44.viewmodel-testing",{"title":1621,"path":1622,"stem":1623},"Avalonia Headless Testing — тестування UI без вікон","/csharp/desktop-ui/44a.avalonia-headless-testing","01.csharp/12.desktop-ui/44a.avalonia-headless-testing",{"title":1625,"path":1626,"stem":1627},"Кросплатформна розробка з Avalonia","/csharp/desktop-ui/avalonia-cross-platform","01.csharp/12.desktop-ui/45.avalonia-cross-platform",{"title":1629,"path":1630,"stem":1631},"Пакування та розгортання Avalonia додатків","/csharp/desktop-ui/avalonia-packaging-deployment","01.csharp/12.desktop-ui/46.avalonia-packaging-deployment",{"title":1633,"path":1634,"stem":1635},"Розгортання WPF застосунків","/csharp/desktop-ui/wpf-packaging-deployment","01.csharp/12.desktop-ui/47.wpf-packaging-deployment",{"title":1637,"path":1638,"stem":1639},"C# & .NET: The Ultimate Roadmap","/csharp/roadmap","01.csharp/roadmap",{"title":1641,"icon":1642,"path":1643,"stem":1644,"children":1645,"page":59},"C++","i-devicon-cplusplus","/cpp","02.cpp",[1646,1650,1654,1658,1662,1666,1670,1674,1678,1681,1685,1689,1693,1697,1701,1705,1709,1713,1717,1721,1725,1729,1733,1737,1741,1745,1749,1753,1757,1761],{"title":1647,"path":1648,"stem":1649},"Вступ у програмування та алгоритми","/cpp/intro-algorithms","02.cpp/01.intro-algorithms",{"title":1651,"path":1652,"stem":1653},"Code Style: угоди про оформлення коду","/cpp/code-style","02.cpp/02.code-style",{"title":1655,"path":1656,"stem":1657},"Середовище розробки та перший 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типу void","/cpp/void-pointers","02.cpp/20.void-pointers",{"title":1726,"path":1727,"stem":1728},"Вказівники на вказівники","/cpp/pointers-to-pointers","02.cpp/21.pointers-to-pointers",{"title":1730,"path":1731,"stem":1732},"Оператор доступу до членів через вказівник (->)","/cpp/member-access-operator","02.cpp/22.member-access-operator",{"title":1734,"path":1735,"stem":1736},"Цикл for-each (Range-based for)","/cpp/foreach-loop","02.cpp/23.foreach-loop",{"title":1738,"path":1739,"stem":1740},"Вказівники на функції","/cpp/function-pointers","02.cpp/24.function-pointers",{"title":1742,"path":1743,"stem":1744},"Лямбда-вирази","/cpp/lambdas","02.cpp/25.lambdas",{"title":1746,"path":1747,"stem":1748},"Лямбда-захоплення","/cpp/lambda-captures","02.cpp/26.lambda-captures",{"title":1750,"path":1751,"stem":1752},"Еліпсис","/cpp/ellipsis","02.cpp/27.ellipsis",{"title":1754,"path":1755,"stem":1756},"Аргументи командного рядка","/cpp/command-line-arguments","02.cpp/28.command-line-arguments",{"title":1758,"path":1759,"stem":1760},"Перерахування (enum)","/cpp/enum","02.cpp/29.enum",{"title":1762,"path":1763,"stem":1764},"План навчання: Курс C++ — Продовження (Статті 29–60+)","/cpp/curriculum-plan","02.cpp/curriculum-plan",{"title":1766,"icon":1767,"path":1768,"stem":1769,"children":1770,"page":59},"JavaScript","i-devicon-javascript","/javascript","03.javascript",[1771,1797,1851,1873,2177,2215],{"title":1772,"icon":1773,"path":1774,"stem":1775,"children":1776,"page":59},"Events","i-lucide-mouse-pointer-click","/javascript/events","03.javascript/01.events",[1777,1781,1785,1789,1793],{"title":1778,"path":1779,"stem":1780},"Вступ до подій браузера","/javascript/events/intro","03.javascript/01.events/01.intro",{"title":1782,"path":1783,"stem":1784},"Бульбашковий механізм (Bubbling) та занурення (Capturing)","/javascript/events/bubbling-capturing","03.javascript/01.events/02.bubbling-capturing",{"title":1786,"path":1787,"stem":1788},"Делегування подій (Event Delegation)","/javascript/events/delegate-events","03.javascript/01.events/03.delegate-events",{"title":1790,"path":1791,"stem":1792},"Типові дії браузера та preventDefault()","/javascript/events/prevent-default","03.javascript/01.events/04.prevent-default",{"title":1794,"path":1795,"stem":1796},"Запуск користувацьких подій (Custom Events)","/javascript/events/custom-events","03.javascript/01.events/05.custom-events",{"title":1798,"icon":1799,"path":1800,"stem":1801,"children":1802,"page":59},"Network","i-lucide-globe","/javascript/network","03.javascript/02.network",[1803,1807,1811,1815,1819,1823,1827,1831,1835,1839,1843,1847],{"title":1804,"path":1805,"stem":1806},"Fetch API - Сучасний підхід до HTTP-запитів","/javascript/network/01-fetch-api","03.javascript/02.network/01-fetch-api",{"title":1808,"path":1809,"stem":1810},"FormData - Робота з формами та файлами","/javascript/network/02-formdata","03.javascript/02.network/02-formdata",{"title":1812,"path":1813,"stem":1814},"Відстеження прогресу завантаження","/javascript/network/03-download-progress","03.javascript/02.network/03-download-progress",{"title":1816,"path":1817,"stem":1818},"Переривання fetch-запитів","/javascript/network/04-abort-requests","03.javascript/02.network/04-abort-requests",{"title":1820,"path":1821,"stem":1822},"CORS - Запити між різними джерелами","/javascript/network/05-cors","03.javascript/02.network/05-cors",{"title":1824,"path":1825,"stem":1826},"Fetch API - Повний довідник опцій","/javascript/network/06-fetch-options","03.javascript/02.network/06-fetch-options",{"title":1828,"path":1829,"stem":1830},"URL Objects - Робота з посиланнями","/javascript/network/07-url-objects","03.javascript/02.network/07-url-objects",{"title":1832,"path":1833,"stem":1834},"XMLHttpRequest - AJAX та низькорівневі запити","/javascript/network/08-xmlhttprequest","03.javascript/02.network/08-xmlhttprequest",{"title":1836,"path":1837,"stem":1838},"Відновлюване завантаження файлів","/javascript/network/09-resumable-upload","03.javascript/02.network/09-resumable-upload",{"title":1840,"path":1841,"stem":1842},"Cookies, document.cookie та світ після \"Cookiepocalypse\"","/javascript/network/10-cookies","03.javascript/02.network/10-cookies",{"title":1844,"path":1845,"stem":1846},"js-cookie: Керування Cookies без Болю","/javascript/network/11-js-cookie","03.javascript/02.network/11-js-cookie",{"title":1848,"path":1849,"stem":1850},"Axios: Потужний HTTP-клієнт для JavaScript","/javascript/network/12-axios","03.javascript/02.network/12-axios",{"title":1852,"icon":1853,"path":1854,"stem":1855,"children":1856,"page":59},"Bom","i-lucide-monitor","/javascript/bom","03.javascript/03.bom",[1857,1861,1865,1869],{"title":1858,"path":1859,"stem":1860},"LocalStorage, SessionStorage та patterns збереження даних","/javascript/bom/01-localstorage","03.javascript/03.bom/01-localstorage",{"title":1862,"path":1863,"stem":1864},"Location Object - Керування адресою сторінки","/javascript/bom/02-location-object","03.javascript/03.bom/02-location-object",{"title":1866,"path":1867,"stem":1868},"History API - Керування історією браузера","/javascript/bom/03-history-api","03.javascript/03.bom/03-history-api",{"title":1870,"path":1871,"stem":1872},"Navigator Object - Ідентифікація та Можливості Пристрою","/javascript/bom/04-navigator-object","03.javascript/03.bom/04-navigator-object",{"title":1874,"icon":1875,"path":1876,"stem":1877,"children":1878},"React","i-devicon-react","/javascript/react","03.javascript/04.react/index",[1879,1880,1884,1888,1892,1896,1959,1994,2146],{"title":1874,"path":1876,"stem":1877},{"title":1881,"path":1882,"stem":1883},"Робота з Формами в React","/javascript/react/react-forms","03.javascript/04.react/01.react-forms",{"title":1885,"path":1886,"stem":1887},"React Hook Form: Професійна Робота з Формами","/javascript/react/react-hook-form","03.javascript/04.react/02.react-hook-form",{"title":1889,"path":1890,"stem":1891},"React Hook Form: Глибоке Розуміння Архітектури та Оптимізації","/javascript/react/react-hook-form-new","03.javascript/04.react/02.react-hook-form-new",{"title":1893,"path":1894,"stem":1895},"Axios та React: Професійна Архітектура Запитів","/javascript/react/data-fetching-axios","03.javascript/04.react/03.data-fetching-axios",{"title":1897,"icon":132,"path":1898,"stem":1899,"children":1900},"Tanstack Query","/javascript/react/tanstack-query","03.javascript/04.react/04.tanstack-query/index",[1901,1903,1907,1911,1915,1919,1923,1927,1931,1935,1939,1943,1947,1951,1955],{"title":1902,"path":1898,"stem":1899},"TanStack Query: Майстерність Керування Станом Сервера",{"title":1904,"path":1905,"stem":1906},"Парадигма Server State: Чому useEffect недостатньо","/javascript/react/tanstack-query/server-state-paradigm","03.javascript/04.react/04.tanstack-query/01.server-state-paradigm",{"title":1908,"path":1909,"stem":1910},"Встановлення та Налаштування: Фундамент","/javascript/react/tanstack-query/installation-and-devtools","03.javascript/04.react/04.tanstack-query/02.installation-and-devtools",{"title":1912,"path":1913,"stem":1914},"Основи Запитів та Магія Ключів","/javascript/react/tanstack-query/query-basics-and-keys","03.javascript/04.react/04.tanstack-query/03.query-basics-and-keys",{"title":1916,"path":1917,"stem":1918},"Синхронізація Даних: Життєвий Цикл Запиту","/javascript/react/tanstack-query/data-synchronization","03.javascript/04.react/04.tanstack-query/04.data-synchronization",{"title":1920,"path":1921,"stem":1922},"Мутації та Інвалідація: Зміна Даних","/javascript/react/tanstack-query/mutations-and-invalidation","03.javascript/04.react/04.tanstack-query/05.mutations-and-invalidation",{"title":1924,"path":1925,"stem":1926},"Оптимістичні Оновлення: Швидше за Світло","/javascript/react/tanstack-query/optimistic-updates","03.javascript/04.react/04.tanstack-query/06.optimistic-updates",{"title":1928,"path":1929,"stem":1930},"Пагінація та Infinite Scroll","/javascript/react/tanstack-query/pagination-and-load-more","03.javascript/04.react/04.tanstack-query/07.pagination-and-load-more",{"title":1932,"path":1933,"stem":1934},"Просунуті Патерни та Оптимізація","/javascript/react/tanstack-query/advanced-patterns","03.javascript/04.react/04.tanstack-query/08.advanced-patterns",{"title":1936,"path":1937,"stem":1938},"Архітектура та Best Practices","/javascript/react/tanstack-query/architecture-and-best-practices","03.javascript/04.react/04.tanstack-query/09.architecture-and-best-practices",{"title":1940,"path":1941,"stem":1942},"Server-Side Rendering (SSR) та Гідратація","/javascript/react/tanstack-query/server-side-rendering","03.javascript/04.react/04.tanstack-query/10.server-side-rendering",{"title":1944,"path":1945,"stem":1946},"Стратегії Тестування","/javascript/react/tanstack-query/testing-strategies","03.javascript/04.react/04.tanstack-query/11.testing-strategies",{"title":1948,"path":1949,"stem":1950},"Аутентифікація та Обробка Помилок","/javascript/react/tanstack-query/authentication-and-errors","03.javascript/04.react/04.tanstack-query/12.authentication-and-errors",{"title":1952,"path":1953,"stem":1954},"React Suspense та Майбутнє","/javascript/react/tanstack-query/react-suspense","03.javascript/04.react/04.tanstack-query/13.react-suspense",{"title":1956,"path":1957,"stem":1958},"Глибоке Занурення в Продуктивність","/javascript/react/tanstack-query/performance-deep-dive","03.javascript/04.react/04.tanstack-query/14.performance-deep-dive",{"title":1960,"icon":1875,"path":1961,"stem":1962,"children":1963},"React Router","/javascript/react/react-router","03.javascript/04.react/05.react-router/index",[1964,1966,1970,1974,1978,1982,1986,1990],{"title":1965,"path":1961,"stem":1962},"React Router: Навігаційна система сучасного вебу",{"title":1967,"path":1968,"stem":1969},"Налаштування та Базовий Роутинг","/javascript/react/react-router/setup-and-basic-routing","03.javascript/04.react/05.react-router/01.setup-and-basic-routing",{"title":1971,"path":1972,"stem":1973},"Динамічна Навігація","/javascript/react/react-router/navigation-and-links","03.javascript/04.react/05.react-router/02.navigation-and-links",{"title":1975,"path":1976,"stem":1977},"Вкладені Маршрути та Макети","/javascript/react/react-router/nested-routes-and-layouts","03.javascript/04.react/05.react-router/03.nested-routes-and-layouts",{"title":1979,"path":1980,"stem":1981},"Динамічні Маршрути та Параметри","/javascript/react/react-router/dynamic-routing","03.javascript/04.react/05.react-router/04.dynamic-routing",{"title":1983,"path":1984,"stem":1985},"Data APIs: Loaders та Actions","/javascript/react/react-router/data-loading","03.javascript/04.react/05.react-router/05.data-loading",{"title":1987,"path":1988,"stem":1989},"Просунуті Патерни","/javascript/react/react-router/advanced-patterns","03.javascript/04.react/05.react-router/06.advanced-patterns",{"title":1991,"path":1992,"stem":1993},"Legacy Routing: Компонентний підхід","/javascript/react/react-router/legacy-routing","03.javascript/04.react/05.react-router/07.legacy-routing",{"title":1995,"icon":132,"path":1996,"stem":1997,"children":1998},"Redux","/javascript/react/redux","03.javascript/04.react/06.redux/index",[1999,2001,2017,2046,2055,2076,2092,2121],{"title":2000,"path":1996,"stem":1997},"Redux: Еволюція управління станом",{"title":14,"icon":15,"path":2002,"stem":2003,"children":2004,"page":59},"/javascript/react/redux/fundamentals","03.javascript/04.react/06.redux/01.fundamentals",[2005,2009,2013],{"title":2006,"path":2007,"stem":2008},"Вступ до State Management","/javascript/react/redux/fundamentals/intro-state-management","03.javascript/04.react/06.redux/01.fundamentals/01.intro-state-management",{"title":2010,"path":2011,"stem":2012},"Філософія Redux та Три Принципи","/javascript/react/redux/fundamentals/redux-philosophy","03.javascript/04.react/06.redux/01.fundamentals/02.redux-philosophy",{"title":2014,"path":2015,"stem":2016},"Чисті функції та Іммутабельність","/javascript/react/redux/fundamentals/pure-functions-immutability","03.javascript/04.react/06.redux/01.fundamentals/03.pure-functions-immutability",{"title":2018,"icon":132,"path":2019,"stem":2020,"children":2021,"page":59},"Classic Redux","/javascript/react/redux/classic-redux","03.javascript/04.react/06.redux/02.classic-redux",[2022,2026,2030,2034,2038,2042],{"title":2023,"path":2024,"stem":2025},"Створення Store (Classic Redux)","/javascript/react/redux/classic-redux/store-setup","03.javascript/04.react/06.redux/02.classic-redux/01.store-setup",{"title":2027,"path":2028,"stem":2029},"Actions, Constants та Action Creators","/javascript/react/redux/classic-redux/actions-constants","03.javascript/04.react/06.redux/02.classic-redux/02.actions-constants",{"title":2031,"path":2032,"stem":2033},"Логіка Reducers","/javascript/react/redux/classic-redux/reducers","03.javascript/04.react/06.redux/02.classic-redux/03.reducers",{"title":2035,"path":2036,"stem":2037},"Комбінування Reducers (Root Reducer)","/javascript/react/redux/classic-redux/data-flow","03.javascript/04.react/06.redux/02.classic-redux/04.data-flow",{"title":2039,"path":2040,"stem":2041},"Підключення до React (React-Redux)","/javascript/react/redux/classic-redux/react-redux-connection","03.javascript/04.react/06.redux/02.classic-redux/05.react-redux-connection",{"title":2043,"path":2044,"stem":2045},"Middleware та Асинхронність (Redux Thunk)","/javascript/react/redux/classic-redux/middleware-thunk","03.javascript/04.react/06.redux/02.classic-redux/06.middleware-thunk",{"title":2047,"icon":132,"path":2048,"stem":2049,"children":2050,"page":59},"Transition To Rtk","/javascript/react/redux/transition-to-rtk","03.javascript/04.react/06.redux/03.transition-to-rtk",[2051],{"title":2052,"path":2053,"stem":2054},"Проблеми класичного Redux","/javascript/react/redux/transition-to-rtk/problems-with-classic","03.javascript/04.react/06.redux/03.transition-to-rtk/01.problems-with-classic",{"title":2056,"icon":132,"path":2057,"stem":2058,"children":2059,"page":59},"Redux Toolkit","/javascript/react/redux/redux-toolkit","03.javascript/04.react/06.redux/04.redux-toolkit",[2060,2064,2068,2072],{"title":2061,"path":2062,"stem":2063},"Налаштування Store з 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дружити","/java/pr2/impedance-mismatch","04.java/pr2/09.impedance-mismatch",{"title":2285,"path":2286,"stem":2287},"JDBC: Перший контакт із базою даних","/java/pr2/jdbc-fundamentals","04.java/pr2/10.jdbc-fundamentals",{"title":2289,"path":2290,"stem":2291},"Якість коду: Spotless, SpotBugs та SonarQube","/java/pr2/10a.code-quality","04.java/pr2/10a.code-quality",{"title":2293,"path":2294,"stem":2295},"Connection Pool: Патерн Object Pool для JDBC-з'єднань","/java/pr2/connection-pool","04.java/pr2/11.connection-pool",{"title":2297,"path":2298,"stem":2299},"Row Data Gateway: Об'єкт як обгортка рядка таблиці","/java/pr2/row-data-gateway","04.java/pr2/12.row-data-gateway",{"title":2301,"path":2302,"stem":2303},"Table Data Gateway: Фасад таблиці як архітектурний відступ","/java/pr2/table-data-gateway","04.java/pr2/13.table-data-gateway",{"title":2305,"path":2306,"stem":2307},"Repository + Data Mapper: Правильна шарова архітектура з JDBC","/java/pr2/repository-data-mapper","04.java/pr2/14.repository-data-mapper",{"title":2309,"path":2310,"stem":2311},"Identity Map: Кешування сутностей у рамках сесії","/java/pr2/identity-map","04.java/pr2/15.identity-map",{"title":2313,"path":2314,"stem":2315},"Unit of Work: Відстеження змін і координація JDBC-транзакцій","/java/pr2/unit-of-work","04.java/pr2/16.unit-of-work",{"title":2317,"path":2318,"stem":2319},"Strategy: Замінювані SQL-стратегії для підтримки різних СУБД","/java/pr2/strategy-sql","04.java/pr2/17.strategy-sql",{"title":2321,"path":2322,"stem":2323},"Proxy: Lazy Loading для One-To-Many колекцій","/java/pr2/proxy-lazy-loading","04.java/pr2/18.proxy-lazy-loading",{"title":2325,"path":2326,"stem":2327},"Generic Repository через Java Reflection: анотації та динамічний SQL","/java/pr2/generic-repository-reflection","04.java/pr2/19.generic-repository-reflection",{"title":2329,"path":2330,"stem":2331},"Specification Pattern: Композиція бізнес-правил для складних 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БД","/databases/intro/logical-schema","06.databases/01.intro/04.logical-schema",{"title":2381,"path":2382,"stem":2383},"Класифікація таблиць","/databases/intro/table-classification","06.databases/01.intro/05.table-classification",{"title":2385,"path":2386,"stem":2387},"PlantUML для баз даних","/databases/intro/plantuml-diagrams","06.databases/01.intro/06.plantuml-diagrams",{"title":2389,"icon":2354,"path":2390,"stem":2391,"children":2392,"page":59},"MS SQL Server Start","/databases/ms-sql-server-start","06.databases/02.ms-sql-server-start",[2393,2397,2403,2407],{"title":2394,"path":2395,"stem":2396},"Типи даних у MS SQL Server","/databases/ms-sql-server-start/data-types","06.databases/02.ms-sql-server-start/01.data-types",{"title":2398,"path":2399,"stem":2400,"children":2401},"Індекси у MS SQL 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TABLE)","/databases/sql/ddl-create-table","06.databases/03.sql/01.ddl-create-table",{"title":2425,"path":2426,"stem":2427},"DDL - Зміна та видалення таблиць (ALTER, DROP)","/databases/sql/ddl-alter-drop-table","06.databases/03.sql/02.ddl-alter-drop-table",{"title":2429,"path":2430,"stem":2431},"SELECT запити - Основи","/databases/sql/select-queries-fundamentals","06.databases/03.sql/03.select-queries-fundamentals",{"title":2433,"path":2434,"stem":2435},"SELECT запити - Розширені можливості","/databases/sql/select-queries-advanced","06.databases/03.sql/04.select-queries-advanced",{"title":2437,"path":2438,"stem":2439},"INSERT запити - Додавання даних","/databases/sql/insert-queries","06.databases/03.sql/05.insert-queries",{"title":2441,"path":2442,"stem":2443},"UPDATE та DELETE запити","/databases/sql/update-delete-queries","06.databases/03.sql/06.update-delete-queries",{"title":2445,"path":2446,"stem":2447},"Транзакції в SQL","/databases/sql/transactions","06.databases/03.sql/07.transactions",{"title":2449,"icon":2354,"path":2450,"stem":2451,"children":2452,"page":59},"Multi Table Databases","/databases/multi-table-databases","06.databases/04.multi-table-databases",[2453,2457,2461,2465,2469,2473],{"title":2454,"path":2455,"stem":2456},"Зв'язки та нормалізація БД","/databases/multi-table-databases/relationships-and-normalization","06.databases/04.multi-table-databases/00.relationships-and-normalization",{"title":2458,"path":2459,"stem":2460},"INNER JOIN - З'єднання таблиць","/databases/multi-table-databases/inner-join","06.databases/04.multi-table-databases/01.inner-join",{"title":2462,"path":2463,"stem":2464},"OUTER JOINs - LEFT, RIGHT, FULL","/databases/multi-table-databases/outer-joins","06.databases/04.multi-table-databases/02.outer-joins",{"title":2466,"path":2467,"stem":2468},"CROSS та SELF JOINs","/databases/multi-table-databases/cross-self-joins","06.databases/04.multi-table-databases/03.cross-self-joins",{"title":2470,"path":2471,"stem":2472},"Підзапити (Subqueries)","/databases/multi-table-databases/subqueries","06.databases/04.multi-table-databases/04.subqueries",{"title":2474,"path":2475,"stem":2476},"Агрегації з JOIN","/databases/multi-table-databases/aggregations-with-joins","06.databases/04.multi-table-databases/05.aggregations-with-joins",{"title":2478,"icon":2479,"path":2480,"stem":2481,"children":2482,"page":59},"Aggregate Functions","i-lucide-calculator","/databases/aggregate-functions","06.databases/05.aggregate-functions",[2483,2487,2491],{"title":2484,"path":2485,"stem":2486},"Функції агрегування в MS SQL Server","/databases/aggregate-functions/introduction-aggregate-functions","06.databases/05.aggregate-functions/01.introduction-aggregate-functions",{"title":2488,"path":2489,"stem":2490},"Групування даних в MS SQL Server","/databases/aggregate-functions/grouping-data","06.databases/05.aggregate-functions/02.grouping-data",{"title":2492,"path":2493,"stem":2494},"Підзапити з агрегатними функціями","/databases/aggregate-functions/subqueries-aggregates","06.databases/05.aggregate-functions/03.subqueries-aggregates",{"title":2496,"icon":2497,"path":2498,"stem":2499,"children":2500,"page":59},"Тригери та зберігаємі процедури","i-lucide-database-zap","/databases/triggers-stored-procedures","06.databases/07.triggers-stored-procedures",[2501,2505,2509,2513,2517,2521,2525],{"title":2502,"path":2503,"stem":2504},"DML-тригери","/databases/triggers-stored-procedures/dml-triggers","06.databases/07.triggers-stored-procedures/01.dml-triggers",{"title":2506,"path":2507,"stem":2508},"DDL-тригери","/databases/triggers-stored-procedures/ddl-triggers","06.databases/07.triggers-stored-procedures/02.ddl-triggers",{"title":2510,"path":2511,"stem":2512},"Transact-SQL 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навіщо?","/tools/docker/docker-what-and-why","07.tools/01.docker/02.docker-what-and-why",{"title":2582,"path":2583,"stem":2584},"Архітектура Docker Engine","/tools/docker/docker-architecture","07.tools/01.docker/03.docker-architecture",{"title":2586,"path":2587,"stem":2588},"Встановлення Docker","/tools/docker/installation","07.tools/01.docker/04.installation",{"title":2590,"path":2591,"stem":2592},"Перший контейнер — docker run","/tools/docker/first-container","07.tools/01.docker/05.first-container",{"title":2594,"path":2595,"stem":2596},"Життєвий цикл контейнера","/tools/docker/container-lifecycle","07.tools/01.docker/06.container-lifecycle",{"title":2598,"path":2599,"stem":2600},"Docker Images — фундаментальні концепції","/tools/docker/docker-images-fundamentals","07.tools/01.docker/07.docker-images-fundamentals",{"title":2602,"path":2603,"stem":2604},"Dockerfile — основи","/tools/docker/dockerfile-basics","07.tools/01.docker/08.dockerfile-basics",{"title":2606,"path":2607,"stem":2608},"Dockerfile — просунуті техніки","/tools/docker/dockerfile-advanced","07.tools/01.docker/09.dockerfile-advanced",{"title":2610,"path":2611,"stem":2612},"Build Context та кешування шарів","/tools/docker/build-context-and-cache","07.tools/01.docker/10.build-context-and-cache",{"title":2614,"path":2615,"stem":2616},"Реєстри Docker-образів","/tools/docker/image-registries","07.tools/01.docker/11.image-registries",{"title":2618,"path":2619,"stem":2620},"Контейнеризація .NET додатків","/tools/docker/dotnet-containerization","07.tools/01.docker/12.dotnet-containerization",{"title":2622,"path":2623,"stem":2624},"Томи та збереження даних","/tools/docker/volumes-and-data","07.tools/01.docker/13.volumes-and-data",{"title":2626,"path":2627,"stem":2628},"Основи мережі в Docker","/tools/docker/networking-basics","07.tools/01.docker/14.networking-basics",{"title":2630,"path":2631,"stem":2632},"Змінні оточення та конфігурація","/tools/docker/environment-and-configuration","07.tools/01.docker/15.environment-and-configuration",{"title":2634,"path":2635,"stem":2636},"Docker Compose — оркестрація контейнерів","/tools/docker/docker-compose-basics","07.tools/01.docker/16.docker-compose-basics",{"title":2638,"path":2639,"stem":2640},"Docker Compose — Multi-Service застосунки","/tools/docker/compose-multi-service","07.tools/01.docker/17.compose-multi-service",{"title":2642,"icon":2643,"path":2644,"stem":2645,"children":2646,"page":59},"Software Engineering","i-lucide-code-2","/software-engineering","09.software-engineering",[2647,2651,2655,2659,2663,2667,2671,2675,2679,2683,2687],{"title":2648,"path":2649,"stem":2650},"1. 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Архітектурні патерни","/software-engineering/architectural-patterns","09.software-engineering/06.architectural-patterns",{"title":2672,"path":2673,"stem":2674},"Паттерни взаємодії","/software-engineering/patterns-of-interaction","09.software-engineering/07.patterns-of-interaction",{"title":2676,"path":2677,"stem":2678},"Евристика проєктування","/software-engineering/design-heuristics","09.software-engineering/08.design-heuristics",{"title":2680,"path":2681,"stem":2682},"Еволюція проєктних рішень","/software-engineering/evolution-of-design-solutions","09.software-engineering/09.evolution-of-design-solutions",{"title":2684,"path":2685,"stem":2686},"EventStorming","/software-engineering/eventstorming","09.software-engineering/10.eventstorming",{"title":2688,"path":2689,"stem":2690},"DDD на практиці","/software-engineering/ddd-in-practice","09.software-engineering/11.ddd-in-practice",{"title":2692,"icon":943,"path":2693,"stem":2694,"children":2695,"page":59},"DDD","/ddd","10.ddd",[2696,2700,2704,2708,2712,2716,2720,2724,2728,2732,2736,2740,2744],{"title":2697,"path":2698,"stem":2699},"Аналіз предметної області","/ddd/domain-analysis","10.ddd/01.domain-analysis",{"title":2701,"path":2702,"stem":2703},"Експертні знання про предметну область","/ddd/domain-expert-knowledge","10.ddd/02.domain-expert-knowledge",{"title":2705,"path":2706,"stem":2707},"Як осмислити складність предметної області","/ddd/managing-domain-complexity","10.ddd/03.managing-domain-complexity",{"title":2709,"path":2710,"stem":2711},"Інтеграція обмежених контекстів","/ddd/bounded-context-integration","10.ddd/04.bounded-context-integration",{"title":2713,"path":2714,"stem":2715},"Реалізація простої бізнес-логіки","/ddd/simple-business-logic","10.ddd/05.simple-business-logic",{"title":2717,"path":2718,"stem":2719},"Обробка складної бізнес-логіки","/ddd/complex-business-logic","10.ddd/06.complex-business-logic",{"title":2721,"path":2722,"stem":2723},"Моделювання фактора часу","/ddd/time-modeling","10.ddd/07.time-modeling",{"title":2725,"path":2726,"stem":2727},"Глава 8. Архітектурні Патерни","/ddd/architectural-patterns","10.ddd/08.architectural-patterns",{"title":2729,"path":2730,"stem":2731},"Глава 9. Патерни Взаємодії","/ddd/interaction-patterns","10.ddd/09.interaction-patterns",{"title":2733,"path":2734,"stem":2735},"Глава 10. Проектні Евристики","/ddd/design-heuristics","10.ddd/10.design-heuristics",{"title":2737,"path":2738,"stem":2739},"Глава 11. Еволюція Проектних Рішень","/ddd/evolution-of-design-decisions","10.ddd/11.evolution-of-design-decisions",{"title":2741,"path":2742,"stem":2743},"Глава 12. EventStorming","/ddd/event-storming","10.ddd/12.event-storming",{"title":2745,"path":2746,"stem":2747},"Глава 13. DDD на Практиці","/ddd/ddd-in-practice","10.ddd/13.ddd-in-practice",{"title":2749,"icon":2750,"path":2751,"stem":2752,"children":2753,"page":59},"Media Streaming","i-lucide-video","/media-streaming","11.media-streaming",[2754,2758,2762,2766,2770,2774,2778],{"title":2755,"path":2756,"stem":2757},"01. 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Війна із Затримкою (Latency)","/media-streaming/realtime-latency","11.media-streaming/07.realtime-latency",{"title":2783,"icon":2784,"path":2785,"stem":2786,"children":2787,"page":59},"HTML & CSS","i-devicon-html5","/html-css","12.html-css",[2788,2792,2796,2800,2804,2808,2812,2816,2820,2824,2828,2832,2836,2840,2844,2848,2852,2856,2860,2864,2868,2872,2876,2880,2884,2888,2892,2896,2900,2904],{"title":2789,"path":2790,"stem":2791},"Вступ до HTML. Структура документа","/html-css/intro-html-structure","12.html-css/01.intro-html-structure",{"title":2793,"path":2794,"stem":2795},"Форматування тексту в HTML","/html-css/html-text-formatting","12.html-css/02.html-text-formatting",{"title":2797,"path":2798,"stem":2799},"Посилання та зображення в HTML","/html-css/html-links-images","12.html-css/03.html-links-images",{"title":2801,"path":2802,"stem":2803},"Списки та таблиці в HTML","/html-css/html-lists-tables","12.html-css/04.html-lists-tables",{"title":2805,"path":2806,"stem":2807},"Форми в HTML","/html-css/html-forms","12.html-css/05.html-forms",{"title":2809,"path":2810,"stem":2811},"Семантичні елементи HTML5","/html-css/html-semantic-elements","12.html-css/06.html-semantic-elements",{"title":2813,"path":2814,"stem":2815},"Мультимедіа та розширені елементи HTML","/html-css/html-multimedia-advanced","12.html-css/07.html-multimedia-advanced",{"title":2817,"path":2818,"stem":2819},"Мікророзмітка та SEO в HTML","/html-css/html-microdata-seo","12.html-css/08.html-microdata-seo",{"title":2821,"path":2822,"stem":2823},"Вступ до CSS. Селектори та специфічність","/html-css/css-intro-selectors","12.html-css/09.css-intro-selectors",{"title":2825,"path":2826,"stem":2827},"Блокова модель CSS. Відступи. Box Sizing","/html-css/css-box-model","12.html-css/10.css-box-model",{"title":2829,"path":2830,"stem":2831},"Розміри у CSS: повний довідник одиниць і ключових слів","/html-css/10a.css-sizing","12.html-css/10a.css-sizing",{"title":2833,"path":2834,"stem":2835},"Типографіка в CSS. Шрифти та текст","/html-css/css-typography","12.html-css/11.css-typography",{"title":2837,"path":2838,"stem":2839},"Кольори та фони в CSS","/html-css/css-colors-backgrounds","12.html-css/12.css-colors-backgrounds",{"title":2841,"path":2842,"stem":2843},"Тіні та фільтри в CSS","/html-css/12b.css-shadows-filters","12.html-css/12b.css-shadows-filters",{"title":2845,"path":2846,"stem":2847},"CSS Flexbox: Фундамент гнучких макетів","/html-css/css-flexbox-fundamentals","12.html-css/13.css-flexbox-fundamentals",{"title":2849,"path":2850,"stem":2851},"CSS Flexbox: Вирівнювання та Позиціонування","/html-css/css-flexbox-alignment-sizing-and-patterns","12.html-css/14.css-flexbox-alignment-sizing-and-patterns",{"title":2853,"path":2854,"stem":2855},"CSS Grid. Двовимірний макет. Частина 1","/html-css/css-layout-grid","12.html-css/15.css-layout-grid",{"title":2857,"path":2858,"stem":2859},"CSS Grid. Двовимірний макет. Частина 2","/html-css/css-layout-grid-advanced","12.html-css/16.css-layout-grid-advanced",{"title":2861,"path":2862,"stem":2863},"Позиціонування в CSS. Z-index. Stacking Context","/html-css/css-positioning","12.html-css/17.css-positioning",{"title":2865,"path":2866,"stem":2867},"CSS Анімації та Переходи","/html-css/css-animations-transitions","12.html-css/18.css-animations-transitions",{"title":2869,"path":2870,"stem":2871},"Адаптивний дизайн. Media Queries. Частина 1","/html-css/css-responsive-media-queries","12.html-css/19.css-responsive-media-queries",{"title":2873,"path":2874,"stem":2875},"Адаптивний дизайн. Частина 2: clamp(), Container Queries, @layer","/html-css/css-responsive-advanced","12.html-css/20.css-responsive-advanced",{"title":2877,"path":2878,"stem":2879},"CSS Custom Properties. Методології. Сучасний CSS","/html-css/css-variables-methodologies","12.html-css/21.css-variables-methodologies",{"title":2881,"path":2882,"stem":2883},"Сучасний CSS 2023–2025: Нові можливості","/html-css/css-modern-features","12.html-css/22.css-modern-features",{"title":2885,"path":2886,"stem":2887},"CSS Nesting, @layer, @scope та @property: нативний препроцесор","/html-css/22a.css-nesting-modern-syntax","12.html-css/22a.css-nesting-modern-syntax",{"title":2889,"path":2890,"stem":2891},"CSS для форм та інтерактивних станів","/html-css/css-forms-interactive-states","12.html-css/23.css-forms-interactive-states",{"title":2893,"path":2894,"stem":2895},"Доступність у CSS (CSS Accessibility)","/html-css/css-accessibility","12.html-css/24.css-accessibility",{"title":2897,"path":2898,"stem":2899},"CSS-функції та сучасні sizing primitives","/html-css/css-functions-sizing","12.html-css/25.css-functions-sizing",{"title":2901,"path":2902,"stem":2903},"Rendering Pipeline і CSS Performance","/html-css/css-rendering-performance","12.html-css/26.css-rendering-performance",{"title":2905,"path":2906,"stem":2907},"CSS Best Practices: типові ситуації та правильні рішення","/html-css/css-best-practices","12.html-css/27.css-best-practices",{"title":2909,"path":2910,"stem":2911,"children":2912,"page":59},"Tailwind","/tailwind","21.tailwind",[2913,2917,2921,2925,2929,2933,2937,2941],{"title":2914,"path":2915,"stem":2916},"Що таке Tailwind CSS і навіщо він потрібен","/tailwind/tailwind-intro-philosophy","21.tailwind/01.tailwind-intro-philosophy",{"title":2918,"path":2919,"stem":2920},"Встановлення та налаштування Tailwind CSS v4","/tailwind/tailwind-installation-setup","21.tailwind/02.tailwind-installation-setup",{"title":2922,"path":2923,"stem":2924},"Utility-класи: основи та система Tailwind","/tailwind/tailwind-utility-classes-core","21.tailwind/03.tailwind-utility-classes-core",{"title":2926,"path":2927,"stem":2928},"Layout: Flexbox та Grid через Tailwind","/tailwind/tailwind-flexbox-grid","21.tailwind/04.tailwind-flexbox-grid",{"title":2930,"path":2931,"stem":2932},"Кастомізація теми через @theme у Tailwind v4","/tailwind/tailwind-theme-customization","21.tailwind/05.tailwind-theme-customization",{"title":2934,"path":2935,"stem":2936},"Варіанти: hover, focus, responsive, dark mode та нові v4","/tailwind/tailwind-variants-states","21.tailwind/06.tailwind-variants-states",{"title":2938,"path":2939,"stem":2940},"Типографіка та система кольорів у Tailwind v4","/tailwind/tailwind-typography-colors","21.tailwind/07.tailwind-typography-colors",{"title":2942,"path":2943,"stem":2944},"Компоненти та повторюваність: @apply, @utility та патерни","/tailwind/tailwind-components-patterns","21.tailwind/08.tailwind-components-patterns",{"title":2946,"path":2947,"stem":2948},"Showcase Компонентів kostyl.dev","/test-new-components","98.test-new-components",{"id":2950,"title":603,"body":2951,"description":9359,"extension":9360,"links":9361,"meta":9362,"navigation":3497,"path":604,"seo":9363,"stem":605,"__hash__":9364},"docs/01.csharp/10.ef-core/22.concurrency-part1.md",{"type":2952,"value":2953,"toc":9324},"minimark",[2954,2959,2964,2982,2985,2992,2995,2998,3002,3007,3013,3016,3026,3044,3048,3054,3060,3063,3081,3085,3091,3097,3108,3112,3118,3124,3136,3138,3142,3145,3149,3159,3165,3172,3178,3220,3226,3230,3244,3250,3253,3268,3275,3279,3365,3367,3371,3374,3378,3381,3605,3611,3907,3913,3928,3932,4094,4100,4338,4343,4623,4627,4801,4806,5328,5330,5334,5349,5353,5362,5595,5599,5942,5946,6354,6358,6600,6617,6619,6623,6627,6630,7865,7869,7872,8990,8992,8996,9000,9090,9094,9149,9153,9268,9270,9274,9277,9312,9320],[2955,2956,2958],"h1",{"id":2957},"конкурентність-та-блокування","Конкурентність та Блокування",[2960,2961,2963],"h2",{"id":2962},"конкурентність-фундаментальна-проблема-oltp-систем","Конкурентність — фундаментальна проблема OLTP систем",[2965,2966,2967,2968,2972,2973,2976,2977,2981],"p",{},"У попередній статті ми розглянули ",[2969,2970,2971],"code",{},"ConcurrencyToken"," і ",[2969,2974,2975],{},"RowVersion"," як інструменти. Тепер — крок назад, щоб зрозуміти ",[2978,2979,2980],"strong",{},"чому"," ці проблеми взагалі виникають і які механізми бази даних їх породжують.",[2965,2983,2984],{},"Кожен веб-застосунок, що обслуговує більше одного користувача одночасно, стикається з конкурентністю. Сотні HTTP-запитів виконуються паралельно, кожен зі своїм DbContext, своєю транзакцією. І всі вони звертаються до спільних рядків у базі даних.",[2965,2986,2987,2988,2991],{},"Без правильної координації виникають ",[2978,2989,2990],{},"феномени конкурентного читання"," — ситуації коли паралельні транзакції «бачать» нераціональний стан даних. Стандарт SQL визначає чотири таких феномени, і кожен IsolationLevel захищає від певної підмножини з них.",[2965,2993,2994],{},"Важливіше — розуміти ці феномени не через визначення з підручника, а через конкретні бізнес-сценарії: що саме може піти не так у вашому застосунку, і яку ціну за це платить користувач.",[2996,2997],"hr",{},[2960,2999,3001],{"id":3000},"read-phenomena-чотири-аномалії-конкурентності","Read Phenomena: чотири аномалії конкурентності",[3003,3004,3006],"h3",{"id":3005},"dirty-read-читання-незафіксованих-змін","Dirty Read: читання незафіксованих змін",[2965,3008,3009,3012],{},[2978,3010,3011],{},"Dirty Read"," — транзакція читає дані, які ще не зафіксовані іншою транзакцією. Якщо та транзакція відкочується — перша прочитала дані, яких ніколи не існувало.",[2965,3014,3015],{},"Класичний сценарій: банківський переказ.",[3017,3018,3023],"pre",{"className":3019,"code":3021,"language":3022},[3020],"language-text","Транзакція A (Переказ):\n  1. UPDATE Accounts SET Balance = Balance - 1000 WHERE Id = 1\n     (Баланс: 5000 → 4000, але транзакція ще не закрита)\n\nТранзакція B (Читання балансу) — ReadUncommitted:\n  2. SELECT Balance FROM Accounts WHERE Id = 1\n     → Повертає 4000 (незафіксовані дані від A!)\n\nТранзакція A:\n  3. ROLLBACK  (помилка у переказі — відміна)\n     (Баланс повертається до 5000)\n\nТранзакція B вже показала клієнту 4000 — цього ніколи не було!\n","text",[2969,3024,3021],{"__ignoreMap":3025},"",[2965,3027,3028,3029,3032,3033,3036,3037,3040,3041,3043],{},"EF Core захист: будь-який ",[2969,3030,3031],{},"IsolationLevel"," вище ",[2969,3034,3035],{},"ReadUncommitted"," захищає від dirty read. ",[2978,3038,3039],{},"Ніколи"," не використовуйте ",[2969,3042,3035],{}," для даних, що впливають на бізнес-рішення.",[3003,3045,3047],{"id":3046},"non-repeatable-read-різні-значення-при-двох-читаннях","Non-Repeatable Read: різні значення при двох читаннях",[2965,3049,3050,3053],{},[2978,3051,3052],{},"Non-Repeatable Read"," — транзакція читає один рядок двічі і отримує різні значення, бо інша транзакція змінила його між цими читаннями.",[3017,3055,3058],{"className":3056,"code":3057,"language":3022},[3020],"Транзакція A (Перевірка і розрахунок):\n  1. SELECT Price FROM Products WHERE Id = 5  → Price = 10000\n     (Обчислення суми замовлення: 3 × 10000 = 30000)\n\nТранзакція B (Зміна ціни):\n  2. UPDATE Products SET Price = 9000 WHERE Id = 5\n  3. COMMIT\n\nТранзакція A:\n  4. SELECT Price FROM Products WHERE Id = 5  → Price = 9000 (інше!)\n     (Підтвердження ціни: невідповідність із кроком 1)\n",[2969,3059,3057],{"__ignoreMap":3025},[2965,3061,3062],{},"Реальний наслідок: замовлення виставлене за ціною 10000, а при повторній перевірці ціна вже 9000. Система показує неузгоджені дані в одному бізнес-процесі.",[2965,3064,3065,3068,3069,3072,3073,3076,3077,3080],{},[2978,3066,3067],{},"Захист",": ",[2969,3070,3071],{},"RepeatableRead"," або вище. ",[2969,3074,3075],{},"ReadCommitted"," ",[2978,3078,3079],{},"не захищає",".",[3003,3082,3084],{"id":3083},"phantom-read-нові-рядки-між-двома-запитами","Phantom Read: нові рядки між двома запитами",[2965,3086,3087,3090],{},[2978,3088,3089],{},"Phantom Read"," — транзакція виконує один і той самий SELECT двічі і отримує різну кількість рядків, бо інша транзакція вставила або видалила рядки.",[3017,3092,3095],{"className":3093,"code":3094,"language":3022},[3020],"Транзакція A (Звіт):\n  1. SELECT COUNT(*) FROM Orders WHERE Status='Pending'  → 10\n     (Підготовка до обробки: 10 замовлень)\n\nТранзакція B:\n  2. INSERT INTO Orders (Status) VALUES ('Pending')  ← нове замовлення\n  3. COMMIT\n\nТранзакція A:\n  4. SELECT * FROM Orders WHERE Status='Pending'  → 11 рядків!\n     (Неочікуваний «фантом» — замовлення #11 не існувало при кроці 1)\n",[2969,3096,3094],{"__ignoreMap":3025},[2965,3098,3099,3068,3101,3104,3105,3107],{},[2978,3100,3067],{},[2969,3102,3103],{},"Serializable",". ",[2969,3106,3071],{}," захищає від змін існуючих рядків, але не від нових.",[3003,3109,3111],{"id":3110},"write-skew-найскладніша-аномалія","Write Skew: найскладніша аномалія",[2965,3113,3114,3117],{},[2978,3115,3116],{},"Write Skew"," не впливає на читання, але стосується логіки запису: дві транзакції читають один стан, кожна приймає рішення що «виглядає правильним» на основі прочитаного, і обидві записують — разом порушуючи інваріант системи.",[3017,3119,3122],{"className":3120,"code":3121,"language":3022},[3020],"Бізнес-правило: у черговій бригаді має бути хоча б 1 лікар.\nЗараз: Doctor_A.OnShift = true, Doctor_B.OnShift = true\n\nТранзакція A (Doctor_A хоче відпросити):\n  1. SELECT COUNT(*) FROM Doctors WHERE OnShift = true  → 2\n     (Можна — залишиться ще Doctor_B)\n  2. UPDATE Doctors SET OnShift = false WHERE Id = A (ЩЕ НЕ COMMIT)\n\nТранзакція B (Doctor_B хоче відпросити — одночасно!):\n  3. SELECT COUNT(*) FROM Doctors WHERE OnShift = true  → 2 (ще бачить A як OnShift)\n     (Теж можна — залишиться Doctor_A)\n  4. UPDATE Doctors SET OnShift = false WHERE Id = B (ЩЕ НЕ COMMIT)\n\nТранзакція A: COMMIT\nТранзакція B: COMMIT\n\nРезультат: обидва лікарі OnShift = false — інваріант порушено!\nНе Dirty Read, не Phantom, не Non-Repeatable — кожна транзакція «бачила» коректний стан.\n",[2969,3123,3121],{"__ignoreMap":3025},[2965,3125,3126,3068,3129,3131,3132,3135],{},[2978,3127,3128],{},"Захист від Write Skew",[2969,3130,3103],{}," або ",[2969,3133,3134],{},"Pessimistic Locking"," (явне блокування при читанні).",[2996,3137],{},[2960,3139,3141],{"id":3140},"mvcc-vs-lock-based-дві-філософії","MVCC vs Lock-based: дві філософії",[2965,3143,3144],{},"Різні СУБД вирішують проблему конкурентності по-різному. Розуміння цієї різниці допомагає обирати правильні стратегії.",[3003,3146,3148],{"id":3147},"lock-based-sql-server-за-замовчуванням","Lock-based (SQL Server за замовчуванням)",[2965,3150,3151,3152,3154,3155,3158],{},"SQL Server у режимі ",[2969,3153,3075],{}," (за замовчуванням) використовує ",[2978,3156,3157],{},"блокування читання",": при SELECT рядок блокується на час читання, при UPDATE — на час транзакції. Читачі чекають на письменників і навпаки.",[3017,3160,3163],{"className":3161,"code":3162,"language":3022},[3020],"Читач    → SELECT * FROM Products WHERE Id=1  → SHARED LOCK (на час читання)\nПисьменник → UPDATE Products WHERE Id=1       → EXCLUSIVE LOCK (чекає на Shared)\n\nАбо:\nПисьменник → UPDATE Products WHERE Id=1       → EXCLUSIVE LOCK\nЧитач      → SELECT * FROM Products WHERE Id=1 → чекає на Exclusive!\n",[2969,3164,3162],{"__ignoreMap":3025},[2965,3166,3167,3168,3171],{},"Це може призвести до ",[2978,3169,3170],{},"Reader-Writer Contention",": велика кількість читачів блокує записи і навпаки.",[2965,3173,3174,3177],{},[2978,3175,3176],{},"Вирішення у SQL Server: RCSI (Read Committed Snapshot Isolation)",". При увімкненні — читачі ніколи не чекають на письменників. Вони читають «знімок» даних на момент початку запиту. Це поведінка ближча до MVCC:",[3017,3179,3183],{"className":3180,"code":3181,"language":3182,"meta":3025,"style":3025},"language-sql shiki shiki-themes light-plus dark-plus dark-plus","-- Увімкнути RCSI для бази:\nALTER DATABASE YourDb SET READ_COMMITTED_SNAPSHOT ON;\n","sql",[2969,3184,3185,3194],{"__ignoreMap":3025},[3186,3187,3190],"span",{"class":3188,"line":3189},"line",1,[3186,3191,3193],{"class":3192},"spJ8K","-- Увімкнути RCSI для бази:\n",[3186,3195,3197,3201,3204,3208,3211,3214,3217],{"class":3188,"line":3196},2,[3186,3198,3200],{"class":3199},"su1O8","ALTER",[3186,3202,3203],{"class":3199}," DATABASE",[3186,3205,3207],{"class":3206},"sHH4Y"," YourDb ",[3186,3209,3210],{"class":3199},"SET",[3186,3212,3213],{"class":3199}," READ_COMMITTED_SNAPSHOT",[3186,3215,3216],{"class":3199}," ON",[3186,3218,3219],{"class":3206},";\n",[2965,3221,3222,3223,3225],{},"Після цього ",[2969,3224,3075],{}," у SQL Server поводиться як Snapshot Isolation — без блокувань при читанні.",[3003,3227,3229],{"id":3228},"mvcc-postgresql-mysql-innodb","MVCC (PostgreSQL, MySQL InnoDB)",[2965,3231,3232,3235,3236,3239,3240,3243],{},[2978,3233,3234],{},"Multi-Version Concurrency Control"," — PostgreSQL зберігає ",[2978,3237,3238],{},"кілька версій"," кожного рядка. Кожна транзакція «бачить» snapshot даних на момент свого початку. Читачі ",[2978,3241,3242],{},"ніколи"," не блокують письменників і навпаки.",[3017,3245,3248],{"className":3246,"code":3247,"language":3022},[3020],"Рядок Products.Id=1 в PostgreSQL (версії через xmin/xmax):\n  [xmin=100, xmax=null,  Price=10000]  ← активна версія\n  [xmin=95,  xmax=100,   Price=9500]   ← старіша версія (для старих транзакцій)\n\nТранзакція B (xid=102, почала після 100):  бачить Price=10000\nТранзакція A (xid=98,  почала до 100):     бачить Price=9500\n",[2969,3249,3247],{"__ignoreMap":3025},[2965,3251,3252],{},"Переваги MVCC:",[3254,3255,3256,3260,3263],"ul",{},[3257,3258,3259],"li",{},"Читання ніколи не блокується записом",[3257,3261,3262],{},"Висока продуктивність при mixed read/write навантаженні",[3257,3264,3265,3267],{},[2969,3266,3071],{}," у PostgreSQL захищає навіть від Phantom Read (на відміну від стандарту SQL)",[2965,3269,3270,3271,3274],{},"Недолік: ",[2978,3272,3273],{},"VACUUM"," — PostgreSQL має прибирати застарілі версії рядків. При надмірній кількості UPDATE без VACUUM — «bloat» і деградація продуктивності.",[3003,3276,3278],{"id":3277},"порівняльна-таблиця","Порівняльна таблиця",[3280,3281,3282,3297],"table",{},[3283,3284,3285],"thead",{},[3286,3287,3288,3291,3294],"tr",{},[3289,3290],"th",{},[3289,3292,3293],{},"SQL Server (Lock)",[3289,3295,3296],{},"PostgreSQL (MVCC)",[3298,3299,3300,3312,3323,3334,3345,3356],"tbody",{},[3286,3301,3302,3306,3309],{},[3303,3304,3305],"td",{},"Читачі блокують письменників",[3303,3307,3308],{},"Так (без RCSI)",[3303,3310,3311],{},"Ні",[3286,3313,3314,3317,3320],{},[3303,3315,3316],{},"Письменники блокують читачів",[3303,3318,3319],{},"Так",[3303,3321,3322],{},"Ні (readers see snapshot)",[3286,3324,3325,3328,3331],{},[3303,3326,3327],{},"Overhead при читанні",[3303,3329,3330],{},"Низький",[3303,3332,3333],{},"Версійний overhead",[3286,3335,3336,3339,3342],{},[3303,3337,3338],{},"Overhead при записі",[3303,3340,3341],{},"Середній (locks)",[3303,3343,3344],{},"Вищий (версіонування)",[3286,3346,3347,3350,3353],{},[3303,3348,3349],{},"Deadlock ймовірність",[3303,3351,3352],{},"Вища",[3303,3354,3355],{},"Нижча",[3286,3357,3358,3361,3363],{},[3303,3359,3360],{},"Vacuum потрібен",[3303,3362,3311],{},[3303,3364,3319],{},[2996,3366],{},[2960,3368,3370],{"id":3369},"практичні-race-conditions-у-ef-core","Практичні Race Conditions у EF Core",[2965,3372,3373],{},"Тепер розглянемо конкретні race conditions що трапляються у реальних застосунках на EF Core і їх вирішення.",[3003,3375,3377],{"id":3376},"race-condition-1-check-then-act","Race Condition 1: Check-Then-Act",[2965,3379,3380],{},"Найпоширеніший паттерн: перевірити умову, прийняти рішення, виконати дію — але між перевіркою і дією стан змінився:",[3017,3382,3386],{"className":3383,"code":3384,"language":3385,"meta":3025,"style":3025},"language-csharp shiki shiki-themes light-plus dark-plus dark-plus","// ❌ НЕБЕЗПЕЧНО: Race Condition між AnyAsync і Add\npublic async Task RegisterUserAsync(string email)\n{\n    // Крок 1: Перевірка унікальності\n    bool exists = await context.Users.AnyAsync(u => u.Email == email);\n    // ← Між тут і кроком 2 інша транзакція може вставити того ж email!\n\n    if (exists)\n        throw new BusinessException(\"Email вже зареєстрований\");\n\n    // Крок 2: Вставка\n    context.Users.Add(new User { Email = email });\n    await context.SaveChangesAsync(); // ← Дублікат можливий!\n}\n","csharp",[2969,3387,3388,3393,3422,3428,3434,3486,3492,3499,3514,3534,3539,3545,3580,3599],{"__ignoreMap":3025},[3186,3389,3390],{"class":3188,"line":3189},[3186,3391,3392],{"class":3192},"// ❌ НЕБЕЗПЕЧНО: Race Condition між AnyAsync і Add\n",[3186,3394,3395,3398,3401,3405,3409,3412,3415,3419],{"class":3188,"line":3196},[3186,3396,3397],{"class":3199},"public",[3186,3399,3400],{"class":3199}," async",[3186,3402,3404],{"class":3403},"sN1BT"," Task",[3186,3406,3408],{"class":3407},"s8Opu"," RegisterUserAsync",[3186,3410,3411],{"class":3206},"(",[3186,3413,3414],{"class":3199},"string",[3186,3416,3418],{"class":3417},"siwwj"," email",[3186,3420,3421],{"class":3206},")\n",[3186,3423,3425],{"class":3188,"line":3424},3,[3186,3426,3427],{"class":3206},"{\n",[3186,3429,3431],{"class":3188,"line":3430},4,[3186,3432,3433],{"class":3192},"    // Крок 1: Перевірка унікальності\n",[3186,3435,3437,3440,3443,3446,3449,3452,3454,3457,3459,3462,3464,3467,3470,3472,3474,3477,3480,3483],{"class":3188,"line":3436},5,[3186,3438,3439],{"class":3199},"    bool",[3186,3441,3442],{"class":3417}," exists",[3186,3444,3445],{"class":3206}," = ",[3186,3447,3448],{"class":3199},"await",[3186,3450,3451],{"class":3417}," context",[3186,3453,3080],{"class":3206},[3186,3455,3456],{"class":3417},"Users",[3186,3458,3080],{"class":3206},[3186,3460,3461],{"class":3407},"AnyAsync",[3186,3463,3411],{"class":3206},[3186,3465,3466],{"class":3417},"u",[3186,3468,3469],{"class":3206}," => ",[3186,3471,3466],{"class":3417},[3186,3473,3080],{"class":3206},[3186,3475,3476],{"class":3417},"Email",[3186,3478,3479],{"class":3206}," == ",[3186,3481,3482],{"class":3417},"email",[3186,3484,3485],{"class":3206},");\n",[3186,3487,3489],{"class":3188,"line":3488},6,[3186,3490,3491],{"class":3192},"    // ← Між тут і кроком 2 інша транзакція може вставити того ж email!\n",[3186,3493,3495],{"class":3188,"line":3494},7,[3186,3496,3498],{"emptyLinePlaceholder":3497},true,"\n",[3186,3500,3502,3506,3509,3512],{"class":3188,"line":3501},8,[3186,3503,3505],{"class":3504},"sCDza","    if",[3186,3507,3508],{"class":3206}," (",[3186,3510,3511],{"class":3417},"exists",[3186,3513,3421],{"class":3206},[3186,3515,3517,3520,3523,3526,3528,3532],{"class":3188,"line":3516},9,[3186,3518,3519],{"class":3504},"        throw",[3186,3521,3522],{"class":3199}," new",[3186,3524,3525],{"class":3403}," BusinessException",[3186,3527,3411],{"class":3206},[3186,3529,3531],{"class":3530},"sbdoH","\"Email вже зареєстрований\"",[3186,3533,3485],{"class":3206},[3186,3535,3537],{"class":3188,"line":3536},10,[3186,3538,3498],{"emptyLinePlaceholder":3497},[3186,3540,3542],{"class":3188,"line":3541},11,[3186,3543,3544],{"class":3192},"    // Крок 2: Вставка\n",[3186,3546,3548,3551,3553,3555,3557,3560,3562,3565,3568,3571,3573,3575,3577],{"class":3188,"line":3547},12,[3186,3549,3550],{"class":3417},"    context",[3186,3552,3080],{"class":3206},[3186,3554,3456],{"class":3417},[3186,3556,3080],{"class":3206},[3186,3558,3559],{"class":3407},"Add",[3186,3561,3411],{"class":3206},[3186,3563,3564],{"class":3199},"new",[3186,3566,3567],{"class":3403}," User",[3186,3569,3570],{"class":3206}," { ",[3186,3572,3476],{"class":3417},[3186,3574,3445],{"class":3206},[3186,3576,3482],{"class":3417},[3186,3578,3579],{"class":3206}," });\n",[3186,3581,3583,3586,3588,3590,3593,3596],{"class":3188,"line":3582},13,[3186,3584,3585],{"class":3199},"    await",[3186,3587,3451],{"class":3417},[3186,3589,3080],{"class":3206},[3186,3591,3592],{"class":3407},"SaveChangesAsync",[3186,3594,3595],{"class":3206},"(); ",[3186,3597,3598],{"class":3192},"// ← Дублікат можливий!\n",[3186,3600,3602],{"class":3188,"line":3601},14,[3186,3603,3604],{"class":3206},"}\n",[2965,3606,3607,3610],{},[2978,3608,3609],{},"Рішення A",": Unique Index + обробка виключення (найефективніше):",[3017,3612,3614],{"className":3383,"code":3613,"language":3385,"meta":3025,"style":3025},"// UNIQUE INDEX у міграції:\nbuilder.HasIndex(u => u.Email).IsUnique();\n\npublic async Task RegisterUserAsync(string email)\n{\n    context.Users.Add(new User { Email = email });\n\n    try\n    {\n        await context.SaveChangesAsync();\n    }\n    catch (DbUpdateException ex) when (IsUniqueConstraintViolation(ex))\n    {\n        throw new BusinessException(\"Email вже зареєстрований\");\n    }\n}\n\nprivate static bool IsUniqueConstraintViolation(DbUpdateException ex)\n{\n    return ex.InnerException is SqlException sqlEx &&\n           (sqlEx.Number == 2627 || sqlEx.Number == 2601); // SQL Server\n    // або PostgreSQL: ex.InnerException is PostgresException pgEx && pgEx.SqlState == \"23505\"\n}\n",[2969,3615,3616,3621,3652,3656,3674,3678,3706,3710,3715,3720,3733,3738,3770,3774,3788,3793,3798,3803,3826,3831,3856,3896,3902],{"__ignoreMap":3025},[3186,3617,3618],{"class":3188,"line":3189},[3186,3619,3620],{"class":3192},"// UNIQUE INDEX у міграції:\n",[3186,3622,3623,3626,3628,3631,3633,3635,3637,3639,3641,3643,3646,3649],{"class":3188,"line":3196},[3186,3624,3625],{"class":3417},"builder",[3186,3627,3080],{"class":3206},[3186,3629,3630],{"class":3407},"HasIndex",[3186,3632,3411],{"class":3206},[3186,3634,3466],{"class":3417},[3186,3636,3469],{"class":3206},[3186,3638,3466],{"class":3417},[3186,3640,3080],{"class":3206},[3186,3642,3476],{"class":3417},[3186,3644,3645],{"class":3206},").",[3186,3647,3648],{"class":3407},"IsUnique",[3186,3650,3651],{"class":3206},"();\n",[3186,3653,3654],{"class":3188,"line":3424},[3186,3655,3498],{"emptyLinePlaceholder":3497},[3186,3657,3658,3660,3662,3664,3666,3668,3670,3672],{"class":3188,"line":3430},[3186,3659,3397],{"class":3199},[3186,3661,3400],{"class":3199},[3186,3663,3404],{"class":3403},[3186,3665,3408],{"class":3407},[3186,3667,3411],{"class":3206},[3186,3669,3414],{"class":3199},[3186,3671,3418],{"class":3417},[3186,3673,3421],{"class":3206},[3186,3675,3676],{"class":3188,"line":3436},[3186,3677,3427],{"class":3206},[3186,3679,3680,3682,3684,3686,3688,3690,3692,3694,3696,3698,3700,3702,3704],{"class":3188,"line":3488},[3186,3681,3550],{"class":3417},[3186,3683,3080],{"class":3206},[3186,3685,3456],{"class":3417},[3186,3687,3080],{"class":3206},[3186,3689,3559],{"class":3407},[3186,3691,3411],{"class":3206},[3186,3693,3564],{"class":3199},[3186,3695,3567],{"class":3403},[3186,3697,3570],{"class":3206},[3186,3699,3476],{"class":3417},[3186,3701,3445],{"class":3206},[3186,3703,3482],{"class":3417},[3186,3705,3579],{"class":3206},[3186,3707,3708],{"class":3188,"line":3494},[3186,3709,3498],{"emptyLinePlaceholder":3497},[3186,3711,3712],{"class":3188,"line":3501},[3186,3713,3714],{"class":3504},"    try\n",[3186,3716,3717],{"class":3188,"line":3516},[3186,3718,3719],{"class":3206},"    {\n",[3186,3721,3722,3725,3727,3729,3731],{"class":3188,"line":3536},[3186,3723,3724],{"class":3199},"        await",[3186,3726,3451],{"class":3417},[3186,3728,3080],{"class":3206},[3186,3730,3592],{"class":3407},[3186,3732,3651],{"class":3206},[3186,3734,3735],{"class":3188,"line":3541},[3186,3736,3737],{"class":3206},"    }\n",[3186,3739,3740,3743,3745,3748,3751,3754,3757,3759,3762,3764,3767],{"class":3188,"line":3547},[3186,3741,3742],{"class":3504},"    catch",[3186,3744,3508],{"class":3206},[3186,3746,3747],{"class":3403},"DbUpdateException",[3186,3749,3750],{"class":3417}," ex",[3186,3752,3753],{"class":3206},") ",[3186,3755,3756],{"class":3504},"when",[3186,3758,3508],{"class":3206},[3186,3760,3761],{"class":3407},"IsUniqueConstraintViolation",[3186,3763,3411],{"class":3206},[3186,3765,3766],{"class":3417},"ex",[3186,3768,3769],{"class":3206},"))\n",[3186,3771,3772],{"class":3188,"line":3582},[3186,3773,3719],{"class":3206},[3186,3775,3776,3778,3780,3782,3784,3786],{"class":3188,"line":3601},[3186,3777,3519],{"class":3504},[3186,3779,3522],{"class":3199},[3186,3781,3525],{"class":3403},[3186,3783,3411],{"class":3206},[3186,3785,3531],{"class":3530},[3186,3787,3485],{"class":3206},[3186,3789,3791],{"class":3188,"line":3790},15,[3186,3792,3737],{"class":3206},[3186,3794,3796],{"class":3188,"line":3795},16,[3186,3797,3604],{"class":3206},[3186,3799,3801],{"class":3188,"line":3800},17,[3186,3802,3498],{"emptyLinePlaceholder":3497},[3186,3804,3806,3809,3812,3815,3818,3820,3822,3824],{"class":3188,"line":3805},18,[3186,3807,3808],{"class":3199},"private",[3186,3810,3811],{"class":3199}," static",[3186,3813,3814],{"class":3199}," bool",[3186,3816,3817],{"class":3407}," IsUniqueConstraintViolation",[3186,3819,3411],{"class":3206},[3186,3821,3747],{"class":3403},[3186,3823,3750],{"class":3417},[3186,3825,3421],{"class":3206},[3186,3827,3829],{"class":3188,"line":3828},19,[3186,3830,3427],{"class":3206},[3186,3832,3834,3837,3839,3841,3844,3847,3850,3853],{"class":3188,"line":3833},20,[3186,3835,3836],{"class":3504},"    return",[3186,3838,3750],{"class":3417},[3186,3840,3080],{"class":3206},[3186,3842,3843],{"class":3417},"InnerException",[3186,3845,3846],{"class":3199}," is",[3186,3848,3849],{"class":3403}," SqlException",[3186,3851,3852],{"class":3417}," sqlEx",[3186,3854,3855],{"class":3206}," &&\n",[3186,3857,3859,3862,3865,3867,3870,3872,3876,3879,3881,3883,3885,3887,3890,3893],{"class":3188,"line":3858},21,[3186,3860,3861],{"class":3206},"           (",[3186,3863,3864],{"class":3417},"sqlEx",[3186,3866,3080],{"class":3206},[3186,3868,3869],{"class":3417},"Number",[3186,3871,3479],{"class":3206},[3186,3873,3875],{"class":3874},"sJj4R","2627",[3186,3877,3878],{"class":3206}," || ",[3186,3880,3864],{"class":3417},[3186,3882,3080],{"class":3206},[3186,3884,3869],{"class":3417},[3186,3886,3479],{"class":3206},[3186,3888,3889],{"class":3874},"2601",[3186,3891,3892],{"class":3206},"); ",[3186,3894,3895],{"class":3192},"// SQL Server\n",[3186,3897,3899],{"class":3188,"line":3898},22,[3186,3900,3901],{"class":3192},"    // або PostgreSQL: ex.InnerException is PostgresException pgEx && pgEx.SqlState == \"23505\"\n",[3186,3903,3905],{"class":3188,"line":3904},23,[3186,3906,3604],{"class":3206},[2965,3908,3909,3912],{},[2978,3910,3911],{},"Рішення B",": Optimistic Concurrency (якщо немає Unique Index):",[3017,3914,3916],{"className":3383,"code":3915,"language":3385,"meta":3025,"style":3025},"// Перевіряємо і вставляємо — якщо між ними вставили дублікат,\n// UNIQUE INDEX спіймає і SaveChanges кине виключення\n",[2969,3917,3918,3923],{"__ignoreMap":3025},[3186,3919,3920],{"class":3188,"line":3189},[3186,3921,3922],{"class":3192},"// Перевіряємо і вставляємо — якщо між ними вставили дублікат,\n",[3186,3924,3925],{"class":3188,"line":3196},[3186,3926,3927],{"class":3192},"// UNIQUE INDEX спіймає і SaveChanges кине виключення\n",[3003,3929,3931],{"id":3930},"race-condition-2-double-spending-інвентаризація","Race Condition 2: Double Spending (інвентаризація)",[3017,3933,3935],{"className":3383,"code":3934,"language":3385,"meta":3025,"style":3025},"// ❌ НЕБЕЗПЕЧНО: Read-Modify-Write без захисту\npublic async Task ReserveProductAsync(int productId, int quantity)\n{\n    var product = await context.Products.FindAsync(productId);\n    // ← Між Read і Write 10 паралельних запитів можуть прочитати Stock=5\n\n    if (product!.Stock \u003C quantity)\n        throw new InsufficientStockException();\n\n    product.Stock -= quantity; // 5 - 1 = 4 (всі 10 прочитали 5 і всі пишуть 4!)\n    await context.SaveChangesAsync();\n    // Результат: Stock = 4, але мало б бути 5 - 10 = -5!\n}\n",[2969,3936,3937,3942,3971,3975,4006,4011,4015,4038,4049,4053,4073,4085,4090],{"__ignoreMap":3025},[3186,3938,3939],{"class":3188,"line":3189},[3186,3940,3941],{"class":3192},"// ❌ НЕБЕЗПЕЧНО: Read-Modify-Write без захисту\n",[3186,3943,3944,3946,3948,3950,3953,3955,3958,3961,3964,3966,3969],{"class":3188,"line":3196},[3186,3945,3397],{"class":3199},[3186,3947,3400],{"class":3199},[3186,3949,3404],{"class":3403},[3186,3951,3952],{"class":3407}," ReserveProductAsync",[3186,3954,3411],{"class":3206},[3186,3956,3957],{"class":3199},"int",[3186,3959,3960],{"class":3417}," productId",[3186,3962,3963],{"class":3206},", ",[3186,3965,3957],{"class":3199},[3186,3967,3968],{"class":3417}," quantity",[3186,3970,3421],{"class":3206},[3186,3972,3973],{"class":3188,"line":3424},[3186,3974,3427],{"class":3206},[3186,3976,3977,3980,3983,3985,3987,3989,3991,3994,3996,3999,4001,4004],{"class":3188,"line":3430},[3186,3978,3979],{"class":3199},"    var",[3186,3981,3982],{"class":3417}," product",[3186,3984,3445],{"class":3206},[3186,3986,3448],{"class":3199},[3186,3988,3451],{"class":3417},[3186,3990,3080],{"class":3206},[3186,3992,3993],{"class":3417},"Products",[3186,3995,3080],{"class":3206},[3186,3997,3998],{"class":3407},"FindAsync",[3186,4000,3411],{"class":3206},[3186,4002,4003],{"class":3417},"productId",[3186,4005,3485],{"class":3206},[3186,4007,4008],{"class":3188,"line":3436},[3186,4009,4010],{"class":3192},"    // ← Між Read і Write 10 паралельних запитів можуть прочитати Stock=5\n",[3186,4012,4013],{"class":3188,"line":3488},[3186,4014,3498],{"emptyLinePlaceholder":3497},[3186,4016,4017,4019,4021,4024,4027,4030,4033,4036],{"class":3188,"line":3494},[3186,4018,3505],{"class":3504},[3186,4020,3508],{"class":3206},[3186,4022,4023],{"class":3417},"product",[3186,4025,4026],{"class":3206},"!.",[3186,4028,4029],{"class":3417},"Stock",[3186,4031,4032],{"class":3206}," \u003C ",[3186,4034,4035],{"class":3417},"quantity",[3186,4037,3421],{"class":3206},[3186,4039,4040,4042,4044,4047],{"class":3188,"line":3501},[3186,4041,3519],{"class":3504},[3186,4043,3522],{"class":3199},[3186,4045,4046],{"class":3403}," InsufficientStockException",[3186,4048,3651],{"class":3206},[3186,4050,4051],{"class":3188,"line":3516},[3186,4052,3498],{"emptyLinePlaceholder":3497},[3186,4054,4055,4058,4060,4062,4065,4067,4070],{"class":3188,"line":3536},[3186,4056,4057],{"class":3417},"    product",[3186,4059,3080],{"class":3206},[3186,4061,4029],{"class":3417},[3186,4063,4064],{"class":3206}," -= ",[3186,4066,4035],{"class":3417},[3186,4068,4069],{"class":3206},"; ",[3186,4071,4072],{"class":3192},"// 5 - 1 = 4 (всі 10 прочитали 5 і всі пишуть 4!)\n",[3186,4074,4075,4077,4079,4081,4083],{"class":3188,"line":3541},[3186,4076,3585],{"class":3199},[3186,4078,3451],{"class":3417},[3186,4080,3080],{"class":3206},[3186,4082,3592],{"class":3407},[3186,4084,3651],{"class":3206},[3186,4086,4087],{"class":3188,"line":3547},[3186,4088,4089],{"class":3192},"    // Результат: Stock = 4, але мало б бути 5 - 10 = -5!\n",[3186,4091,4092],{"class":3188,"line":3582},[3186,4093,3604],{"class":3206},[2965,4095,4096,4099],{},[2978,4097,4098],{},"Вирішення через Optimistic Concurrency",":",[3017,4101,4103],{"className":3383,"code":4102,"language":3385,"meta":3025,"style":3025},"public async Task ReserveProductAsync(int productId, int quantity)\n{\n    // Зовнішній retry loop\n    while (true)\n    {\n        var product = await context.Products.FindAsync(productId);\n\n        if (product!.Stock \u003C quantity)\n            throw new InsufficientStockException();\n\n        product.Stock -= quantity;\n\n        try\n        {\n            await context.SaveChangesAsync();\n            return; // Успіх\n        }\n        catch (DbUpdateConcurrencyException)\n        {\n            // Хтось інший змінив Stock → перезавантажити і повторити\n            await context.Entry(product).ReloadAsync();\n            // Якщо тепер Stock \u003C quantity → InsufficientStockException на наступній ітерації\n        }\n    }\n}\n",[2969,4104,4105,4129,4133,4138,4150,4154,4181,4185,4204,4215,4219,4234,4238,4243,4248,4261,4271,4276,4288,4292,4297,4319,4324,4328,4333],{"__ignoreMap":3025},[3186,4106,4107,4109,4111,4113,4115,4117,4119,4121,4123,4125,4127],{"class":3188,"line":3189},[3186,4108,3397],{"class":3199},[3186,4110,3400],{"class":3199},[3186,4112,3404],{"class":3403},[3186,4114,3952],{"class":3407},[3186,4116,3411],{"class":3206},[3186,4118,3957],{"class":3199},[3186,4120,3960],{"class":3417},[3186,4122,3963],{"class":3206},[3186,4124,3957],{"class":3199},[3186,4126,3968],{"class":3417},[3186,4128,3421],{"class":3206},[3186,4130,4131],{"class":3188,"line":3196},[3186,4132,3427],{"class":3206},[3186,4134,4135],{"class":3188,"line":3424},[3186,4136,4137],{"class":3192},"    // Зовнішній retry loop\n",[3186,4139,4140,4143,4145,4148],{"class":3188,"line":3430},[3186,4141,4142],{"class":3504},"    while",[3186,4144,3508],{"class":3206},[3186,4146,4147],{"class":3199},"true",[3186,4149,3421],{"class":3206},[3186,4151,4152],{"class":3188,"line":3436},[3186,4153,3719],{"class":3206},[3186,4155,4156,4159,4161,4163,4165,4167,4169,4171,4173,4175,4177,4179],{"class":3188,"line":3488},[3186,4157,4158],{"class":3199},"        var",[3186,4160,3982],{"class":3417},[3186,4162,3445],{"class":3206},[3186,4164,3448],{"class":3199},[3186,4166,3451],{"class":3417},[3186,4168,3080],{"class":3206},[3186,4170,3993],{"class":3417},[3186,4172,3080],{"class":3206},[3186,4174,3998],{"class":3407},[3186,4176,3411],{"class":3206},[3186,4178,4003],{"class":3417},[3186,4180,3485],{"class":3206},[3186,4182,4183],{"class":3188,"line":3494},[3186,4184,3498],{"emptyLinePlaceholder":3497},[3186,4186,4187,4190,4192,4194,4196,4198,4200,4202],{"class":3188,"line":3501},[3186,4188,4189],{"class":3504},"        if",[3186,4191,3508],{"class":3206},[3186,4193,4023],{"class":3417},[3186,4195,4026],{"class":3206},[3186,4197,4029],{"class":3417},[3186,4199,4032],{"class":3206},[3186,4201,4035],{"class":3417},[3186,4203,3421],{"class":3206},[3186,4205,4206,4209,4211,4213],{"class":3188,"line":3516},[3186,4207,4208],{"class":3504},"            throw",[3186,4210,3522],{"class":3199},[3186,4212,4046],{"class":3403},[3186,4214,3651],{"class":3206},[3186,4216,4217],{"class":3188,"line":3536},[3186,4218,3498],{"emptyLinePlaceholder":3497},[3186,4220,4221,4224,4226,4228,4230,4232],{"class":3188,"line":3541},[3186,4222,4223],{"class":3417},"        product",[3186,4225,3080],{"class":3206},[3186,4227,4029],{"class":3417},[3186,4229,4064],{"class":3206},[3186,4231,4035],{"class":3417},[3186,4233,3219],{"class":3206},[3186,4235,4236],{"class":3188,"line":3547},[3186,4237,3498],{"emptyLinePlaceholder":3497},[3186,4239,4240],{"class":3188,"line":3582},[3186,4241,4242],{"class":3504},"        try\n",[3186,4244,4245],{"class":3188,"line":3601},[3186,4246,4247],{"class":3206},"        {\n",[3186,4249,4250,4253,4255,4257,4259],{"class":3188,"line":3790},[3186,4251,4252],{"class":3199},"            await",[3186,4254,3451],{"class":3417},[3186,4256,3080],{"class":3206},[3186,4258,3592],{"class":3407},[3186,4260,3651],{"class":3206},[3186,4262,4263,4266,4268],{"class":3188,"line":3795},[3186,4264,4265],{"class":3504},"            return",[3186,4267,4069],{"class":3206},[3186,4269,4270],{"class":3192},"// Успіх\n",[3186,4272,4273],{"class":3188,"line":3800},[3186,4274,4275],{"class":3206},"        }\n",[3186,4277,4278,4281,4283,4286],{"class":3188,"line":3805},[3186,4279,4280],{"class":3504},"        catch",[3186,4282,3508],{"class":3206},[3186,4284,4285],{"class":3403},"DbUpdateConcurrencyException",[3186,4287,3421],{"class":3206},[3186,4289,4290],{"class":3188,"line":3828},[3186,4291,4247],{"class":3206},[3186,4293,4294],{"class":3188,"line":3833},[3186,4295,4296],{"class":3192},"            // Хтось інший змінив Stock → перезавантажити і повторити\n",[3186,4298,4299,4301,4303,4305,4308,4310,4312,4314,4317],{"class":3188,"line":3858},[3186,4300,4252],{"class":3199},[3186,4302,3451],{"class":3417},[3186,4304,3080],{"class":3206},[3186,4306,4307],{"class":3407},"Entry",[3186,4309,3411],{"class":3206},[3186,4311,4023],{"class":3417},[3186,4313,3645],{"class":3206},[3186,4315,4316],{"class":3407},"ReloadAsync",[3186,4318,3651],{"class":3206},[3186,4320,4321],{"class":3188,"line":3898},[3186,4322,4323],{"class":3192},"            // Якщо тепер Stock \u003C quantity → InsufficientStockException на наступній ітерації\n",[3186,4325,4326],{"class":3188,"line":3904},[3186,4327,4275],{"class":3206},[3186,4329,4331],{"class":3188,"line":4330},24,[3186,4332,3737],{"class":3206},[3186,4334,4336],{"class":3188,"line":4335},25,[3186,4337,3604],{"class":3206},[2965,4339,4340,4099],{},[2978,4341,4342],{},"Вирішення через атомарний UPDATE",[3017,4344,4346],{"className":3383,"code":4345,"language":3385,"meta":3025,"style":3025},"// Атомарний UPDATE: якщо Stock >= quantity — зменшити, інакше — нічого\npublic async Task ReserveProductAsync(int productId, int quantity)\n{\n    int rowsAffected = await context.Products\n        .Where(p => p.Id == productId && p.Stock >= quantity)\n        .ExecuteUpdateAsync(s => s.SetProperty(p => p.Stock, p => p.Stock - quantity));\n\n    if (rowsAffected == 0)\n    {\n        // Або продукт не існує, або Stock недостатній\n        var product = await context.Products.FindAsync(productId);\n        if (product is null) throw new NotFoundException();\n        throw new InsufficientStockException($\"Available: {product.Stock}\");\n    }\n}\n// SQL: UPDATE Products SET Stock = Stock - @qty WHERE Id = @id AND Stock >= @qty\n// Атомарна операція: перевірка і зміна в одному SQL — race condition неможливий!\n",[2969,4347,4348,4353,4377,4381,4400,4441,4494,4498,4514,4518,4523,4549,4574,4605,4609,4613,4618],{"__ignoreMap":3025},[3186,4349,4350],{"class":3188,"line":3189},[3186,4351,4352],{"class":3192},"// Атомарний UPDATE: якщо Stock >= quantity — зменшити, інакше — нічого\n",[3186,4354,4355,4357,4359,4361,4363,4365,4367,4369,4371,4373,4375],{"class":3188,"line":3196},[3186,4356,3397],{"class":3199},[3186,4358,3400],{"class":3199},[3186,4360,3404],{"class":3403},[3186,4362,3952],{"class":3407},[3186,4364,3411],{"class":3206},[3186,4366,3957],{"class":3199},[3186,4368,3960],{"class":3417},[3186,4370,3963],{"class":3206},[3186,4372,3957],{"class":3199},[3186,4374,3968],{"class":3417},[3186,4376,3421],{"class":3206},[3186,4378,4379],{"class":3188,"line":3424},[3186,4380,3427],{"class":3206},[3186,4382,4383,4386,4389,4391,4393,4395,4397],{"class":3188,"line":3430},[3186,4384,4385],{"class":3199},"    int",[3186,4387,4388],{"class":3417}," rowsAffected",[3186,4390,3445],{"class":3206},[3186,4392,3448],{"class":3199},[3186,4394,3451],{"class":3417},[3186,4396,3080],{"class":3206},[3186,4398,4399],{"class":3417},"Products\n",[3186,4401,4402,4405,4408,4410,4412,4414,4416,4418,4421,4423,4425,4428,4430,4432,4434,4437,4439],{"class":3188,"line":3436},[3186,4403,4404],{"class":3206},"        .",[3186,4406,4407],{"class":3407},"Where",[3186,4409,3411],{"class":3206},[3186,4411,2965],{"class":3417},[3186,4413,3469],{"class":3206},[3186,4415,2965],{"class":3417},[3186,4417,3080],{"class":3206},[3186,4419,4420],{"class":3417},"Id",[3186,4422,3479],{"class":3206},[3186,4424,4003],{"class":3417},[3186,4426,4427],{"class":3206}," && ",[3186,4429,2965],{"class":3417},[3186,4431,3080],{"class":3206},[3186,4433,4029],{"class":3417},[3186,4435,4436],{"class":3206}," >= ",[3186,4438,4035],{"class":3417},[3186,4440,3421],{"class":3206},[3186,4442,4443,4445,4448,4450,4453,4455,4457,4459,4462,4464,4466,4468,4470,4472,4474,4476,4478,4480,4482,4484,4486,4489,4491],{"class":3188,"line":3488},[3186,4444,4404],{"class":3206},[3186,4446,4447],{"class":3407},"ExecuteUpdateAsync",[3186,4449,3411],{"class":3206},[3186,4451,4452],{"class":3417},"s",[3186,4454,3469],{"class":3206},[3186,4456,4452],{"class":3417},[3186,4458,3080],{"class":3206},[3186,4460,4461],{"class":3407},"SetProperty",[3186,4463,3411],{"class":3206},[3186,4465,2965],{"class":3417},[3186,4467,3469],{"class":3206},[3186,4469,2965],{"class":3417},[3186,4471,3080],{"class":3206},[3186,4473,4029],{"class":3417},[3186,4475,3963],{"class":3206},[3186,4477,2965],{"class":3417},[3186,4479,3469],{"class":3206},[3186,4481,2965],{"class":3417},[3186,4483,3080],{"class":3206},[3186,4485,4029],{"class":3417},[3186,4487,4488],{"class":3206}," - ",[3186,4490,4035],{"class":3417},[3186,4492,4493],{"class":3206},"));\n",[3186,4495,4496],{"class":3188,"line":3494},[3186,4497,3498],{"emptyLinePlaceholder":3497},[3186,4499,4500,4502,4504,4507,4509,4512],{"class":3188,"line":3501},[3186,4501,3505],{"class":3504},[3186,4503,3508],{"class":3206},[3186,4505,4506],{"class":3417},"rowsAffected",[3186,4508,3479],{"class":3206},[3186,4510,4511],{"class":3874},"0",[3186,4513,3421],{"class":3206},[3186,4515,4516],{"class":3188,"line":3516},[3186,4517,3719],{"class":3206},[3186,4519,4520],{"class":3188,"line":3536},[3186,4521,4522],{"class":3192},"        // Або продукт не існує, або Stock недостатній\n",[3186,4524,4525,4527,4529,4531,4533,4535,4537,4539,4541,4543,4545,4547],{"class":3188,"line":3541},[3186,4526,4158],{"class":3199},[3186,4528,3982],{"class":3417},[3186,4530,3445],{"class":3206},[3186,4532,3448],{"class":3199},[3186,4534,3451],{"class":3417},[3186,4536,3080],{"class":3206},[3186,4538,3993],{"class":3417},[3186,4540,3080],{"class":3206},[3186,4542,3998],{"class":3407},[3186,4544,3411],{"class":3206},[3186,4546,4003],{"class":3417},[3186,4548,3485],{"class":3206},[3186,4550,4551,4553,4555,4557,4559,4562,4564,4567,4569,4572],{"class":3188,"line":3547},[3186,4552,4189],{"class":3504},[3186,4554,3508],{"class":3206},[3186,4556,4023],{"class":3417},[3186,4558,3846],{"class":3199},[3186,4560,4561],{"class":3199}," null",[3186,4563,3753],{"class":3206},[3186,4565,4566],{"class":3504},"throw",[3186,4568,3522],{"class":3199},[3186,4570,4571],{"class":3403}," NotFoundException",[3186,4573,3651],{"class":3206},[3186,4575,4576,4578,4580,4582,4584,4587,4591,4593,4595,4597,4600,4603],{"class":3188,"line":3582},[3186,4577,3519],{"class":3504},[3186,4579,3522],{"class":3199},[3186,4581,4046],{"class":3403},[3186,4583,3411],{"class":3206},[3186,4585,4586],{"class":3530},"$\"Available: ",[3186,4588,4590],{"class":4589},"sD7JJ","{",[3186,4592,4023],{"class":3417},[3186,4594,3080],{"class":4589},[3186,4596,4029],{"class":3417},[3186,4598,4599],{"class":4589},"}",[3186,4601,4602],{"class":3530},"\"",[3186,4604,3485],{"class":3206},[3186,4606,4607],{"class":3188,"line":3601},[3186,4608,3737],{"class":3206},[3186,4610,4611],{"class":3188,"line":3790},[3186,4612,3604],{"class":3206},[3186,4614,4615],{"class":3188,"line":3795},[3186,4616,4617],{"class":3192},"// SQL: UPDATE Products SET Stock = Stock - @qty WHERE Id = @id AND Stock >= @qty\n",[3186,4619,4620],{"class":3188,"line":3800},[3186,4621,4622],{"class":3192},"// Атомарна операція: перевірка і зміна в одному SQL — race condition неможливий!\n",[3003,4624,4626],{"id":4625},"race-condition-3-duplicate-insert-ідемпотентність","Race Condition 3: Duplicate Insert (ідемпотентність)",[3017,4628,4630],{"className":3383,"code":4629,"language":3385,"meta":3025,"style":3025},"// ❌ НЕБЕЗПЕЧНО: подвійний POST (мережева помилка → retry від клієнта)\n[HttpPost(\"orders\")]\npublic async Task\u003CIActionResult> CreateOrder(CreateOrderDto dto)\n{\n    var order = new Order { CustomerId = dto.CustomerId, ... };\n    context.Orders.Add(order);\n    await context.SaveChangesAsync();\n    return CreatedAtAction(nameof(GetOrder), new { id = order.Id }, order);\n    // Якщо відповідь не дійшла → клієнт retries → дублікат Order!\n}\n",[2969,4631,4632,4637,4653,4683,4687,4718,4738,4750,4792,4797],{"__ignoreMap":3025},[3186,4633,4634],{"class":3188,"line":3189},[3186,4635,4636],{"class":3192},"// ❌ НЕБЕЗПЕЧНО: подвійний POST (мережева помилка → retry від клієнта)\n",[3186,4638,4639,4642,4645,4647,4650],{"class":3188,"line":3196},[3186,4640,4641],{"class":3206},"[",[3186,4643,4644],{"class":3403},"HttpPost",[3186,4646,3411],{"class":3206},[3186,4648,4649],{"class":3530},"\"orders\"",[3186,4651,4652],{"class":3206},")]\n",[3186,4654,4655,4657,4659,4661,4664,4667,4670,4673,4675,4678,4681],{"class":3188,"line":3424},[3186,4656,3397],{"class":3199},[3186,4658,3400],{"class":3199},[3186,4660,3404],{"class":3403},[3186,4662,4663],{"class":3206},"\u003C",[3186,4665,4666],{"class":3403},"IActionResult",[3186,4668,4669],{"class":3206},"> ",[3186,4671,4672],{"class":3407},"CreateOrder",[3186,4674,3411],{"class":3206},[3186,4676,4677],{"class":3403},"CreateOrderDto",[3186,4679,4680],{"class":3417}," dto",[3186,4682,3421],{"class":3206},[3186,4684,4685],{"class":3188,"line":3430},[3186,4686,3427],{"class":3206},[3186,4688,4689,4691,4694,4696,4698,4701,4703,4706,4708,4711,4713,4715],{"class":3188,"line":3436},[3186,4690,3979],{"class":3199},[3186,4692,4693],{"class":3417}," order",[3186,4695,3445],{"class":3206},[3186,4697,3564],{"class":3199},[3186,4699,4700],{"class":3403}," Order",[3186,4702,3570],{"class":3206},[3186,4704,4705],{"class":3417},"CustomerId",[3186,4707,3445],{"class":3206},[3186,4709,4710],{"class":3417},"dto",[3186,4712,3080],{"class":3206},[3186,4714,4705],{"class":3417},[3186,4716,4717],{"class":3206},", ... };\n",[3186,4719,4720,4722,4724,4727,4729,4731,4733,4736],{"class":3188,"line":3488},[3186,4721,3550],{"class":3417},[3186,4723,3080],{"class":3206},[3186,4725,4726],{"class":3417},"Orders",[3186,4728,3080],{"class":3206},[3186,4730,3559],{"class":3407},[3186,4732,3411],{"class":3206},[3186,4734,4735],{"class":3417},"order",[3186,4737,3485],{"class":3206},[3186,4739,4740,4742,4744,4746,4748],{"class":3188,"line":3494},[3186,4741,3585],{"class":3199},[3186,4743,3451],{"class":3417},[3186,4745,3080],{"class":3206},[3186,4747,3592],{"class":3407},[3186,4749,3651],{"class":3206},[3186,4751,4752,4754,4757,4759,4762,4764,4767,4770,4772,4774,4777,4779,4781,4783,4785,4788,4790],{"class":3188,"line":3501},[3186,4753,3836],{"class":3504},[3186,4755,4756],{"class":3407}," CreatedAtAction",[3186,4758,3411],{"class":3206},[3186,4760,4761],{"class":3199},"nameof",[3186,4763,3411],{"class":3206},[3186,4765,4766],{"class":3417},"GetOrder",[3186,4768,4769],{"class":3206},"), ",[3186,4771,3564],{"class":3199},[3186,4773,3570],{"class":3206},[3186,4775,4776],{"class":3417},"id",[3186,4778,3445],{"class":3206},[3186,4780,4735],{"class":3417},[3186,4782,3080],{"class":3206},[3186,4784,4420],{"class":3417},[3186,4786,4787],{"class":3206}," }, ",[3186,4789,4735],{"class":3417},[3186,4791,3485],{"class":3206},[3186,4793,4794],{"class":3188,"line":3516},[3186,4795,4796],{"class":3192},"    // Якщо відповідь не дійшла → клієнт retries → дублікат Order!\n",[3186,4798,4799],{"class":3188,"line":3536},[3186,4800,3604],{"class":3206},[2965,4802,4803,4099],{},[2978,4804,4805],{},"Вирішення: Idempotency Key",[3017,4807,4809],{"className":3383,"code":4808,"language":3385,"meta":3025,"style":3025},"// Клієнт генерує унікальний ключ запиту і надсилає у заголовку\n// X-Idempotency-Key: \"a1b2c3d4-...\"\n\n[HttpPost(\"orders\")]\npublic async Task\u003CIActionResult> CreateOrder(\n    CreateOrderDto dto,\n    [FromHeader(Name = \"X-Idempotency-Key\")] Guid idempotencyKey)\n{\n    // Перевірити чи вже обробляли цей ключ\n    var existing = await context.IdempotencyKeys\n        .AsNoTracking()\n        .FirstOrDefaultAsync(k => k.Key == idempotencyKey);\n\n    if (existing is not null)\n    {\n        // Повернути той самий результат що і першого разу\n        var existingOrder = await context.Orders.FindAsync(existing.ResultId);\n        return CreatedAtAction(nameof(GetOrder), new { id = existingOrder!.Id }, existingOrder);\n    }\n\n    await using var tx = await context.Database.BeginTransactionAsync();\n\n    var order = new Order { ... };\n    context.Orders.Add(order);\n    await context.SaveChangesAsync();\n\n    // Зберегти ключ разом з Id результату\n    context.IdempotencyKeys.Add(new IdempotencyKey\n    {\n        Key      = idempotencyKey,\n        ResultId = order.Id,\n        ExpiresAt = DateTime.UtcNow.AddDays(7)\n    });\n    await context.SaveChangesAsync();\n\n    await tx.CommitAsync();\n\n    return CreatedAtAction(nameof(GetOrder), new { id = order.Id }, order);\n}\n",[2969,4810,4811,4816,4821,4825,4837,4856,4866,4895,4899,4904,4922,4932,4960,4964,4982,4986,4991,5023,5061,5065,5069,5100,5104,5119,5137,5149,5154,5160,5181,5186,5199,5215,5243,5249,5262,5267,5281,5286,5323],{"__ignoreMap":3025},[3186,4812,4813],{"class":3188,"line":3189},[3186,4814,4815],{"class":3192},"// Клієнт генерує унікальний ключ запиту і надсилає у заголовку\n",[3186,4817,4818],{"class":3188,"line":3196},[3186,4819,4820],{"class":3192},"// X-Idempotency-Key: \"a1b2c3d4-...\"\n",[3186,4822,4823],{"class":3188,"line":3424},[3186,4824,3498],{"emptyLinePlaceholder":3497},[3186,4826,4827,4829,4831,4833,4835],{"class":3188,"line":3430},[3186,4828,4641],{"class":3206},[3186,4830,4644],{"class":3403},[3186,4832,3411],{"class":3206},[3186,4834,4649],{"class":3530},[3186,4836,4652],{"class":3206},[3186,4838,4839,4841,4843,4845,4847,4849,4851,4853],{"class":3188,"line":3436},[3186,4840,3397],{"class":3199},[3186,4842,3400],{"class":3199},[3186,4844,3404],{"class":3403},[3186,4846,4663],{"class":3206},[3186,4848,4666],{"class":3403},[3186,4850,4669],{"class":3206},[3186,4852,4672],{"class":3407},[3186,4854,4855],{"class":3206},"(\n",[3186,4857,4858,4861,4863],{"class":3188,"line":3488},[3186,4859,4860],{"class":3403},"    CreateOrderDto",[3186,4862,4680],{"class":3417},[3186,4864,4865],{"class":3206},",\n",[3186,4867,4868,4871,4874,4876,4879,4881,4884,4887,4890,4893],{"class":3188,"line":3494},[3186,4869,4870],{"class":3206},"    [",[3186,4872,4873],{"class":3403},"FromHeader",[3186,4875,3411],{"class":3206},[3186,4877,4878],{"class":3417},"Name",[3186,4880,3445],{"class":3206},[3186,4882,4883],{"class":3530},"\"X-Idempotency-Key\"",[3186,4885,4886],{"class":3206},")] ",[3186,4888,4889],{"class":3403},"Guid",[3186,4891,4892],{"class":3417}," idempotencyKey",[3186,4894,3421],{"class":3206},[3186,4896,4897],{"class":3188,"line":3501},[3186,4898,3427],{"class":3206},[3186,4900,4901],{"class":3188,"line":3516},[3186,4902,4903],{"class":3192},"    // Перевірити чи вже обробляли цей ключ\n",[3186,4905,4906,4908,4911,4913,4915,4917,4919],{"class":3188,"line":3536},[3186,4907,3979],{"class":3199},[3186,4909,4910],{"class":3417}," existing",[3186,4912,3445],{"class":3206},[3186,4914,3448],{"class":3199},[3186,4916,3451],{"class":3417},[3186,4918,3080],{"class":3206},[3186,4920,4921],{"class":3417},"IdempotencyKeys\n",[3186,4923,4924,4926,4929],{"class":3188,"line":3541},[3186,4925,4404],{"class":3206},[3186,4927,4928],{"class":3407},"AsNoTracking",[3186,4930,4931],{"class":3206},"()\n",[3186,4933,4934,4936,4939,4941,4944,4946,4948,4950,4953,4955,4958],{"class":3188,"line":3547},[3186,4935,4404],{"class":3206},[3186,4937,4938],{"class":3407},"FirstOrDefaultAsync",[3186,4940,3411],{"class":3206},[3186,4942,4943],{"class":3417},"k",[3186,4945,3469],{"class":3206},[3186,4947,4943],{"class":3417},[3186,4949,3080],{"class":3206},[3186,4951,4952],{"class":3417},"Key",[3186,4954,3479],{"class":3206},[3186,4956,4957],{"class":3417},"idempotencyKey",[3186,4959,3485],{"class":3206},[3186,4961,4962],{"class":3188,"line":3582},[3186,4963,3498],{"emptyLinePlaceholder":3497},[3186,4965,4966,4968,4970,4973,4975,4978,4980],{"class":3188,"line":3601},[3186,4967,3505],{"class":3504},[3186,4969,3508],{"class":3206},[3186,4971,4972],{"class":3417},"existing",[3186,4974,3846],{"class":3199},[3186,4976,4977],{"class":3199}," not",[3186,4979,4561],{"class":3199},[3186,4981,3421],{"class":3206},[3186,4983,4984],{"class":3188,"line":3790},[3186,4985,3719],{"class":3206},[3186,4987,4988],{"class":3188,"line":3795},[3186,4989,4990],{"class":3192},"        // Повернути той самий результат що і першого разу\n",[3186,4992,4993,4995,4998,5000,5002,5004,5006,5008,5010,5012,5014,5016,5018,5021],{"class":3188,"line":3800},[3186,4994,4158],{"class":3199},[3186,4996,4997],{"class":3417}," existingOrder",[3186,4999,3445],{"class":3206},[3186,5001,3448],{"class":3199},[3186,5003,3451],{"class":3417},[3186,5005,3080],{"class":3206},[3186,5007,4726],{"class":3417},[3186,5009,3080],{"class":3206},[3186,5011,3998],{"class":3407},[3186,5013,3411],{"class":3206},[3186,5015,4972],{"class":3417},[3186,5017,3080],{"class":3206},[3186,5019,5020],{"class":3417},"ResultId",[3186,5022,3485],{"class":3206},[3186,5024,5025,5028,5030,5032,5034,5036,5038,5040,5042,5044,5046,5048,5051,5053,5055,5057,5059],{"class":3188,"line":3805},[3186,5026,5027],{"class":3504},"        return",[3186,5029,4756],{"class":3407},[3186,5031,3411],{"class":3206},[3186,5033,4761],{"class":3199},[3186,5035,3411],{"class":3206},[3186,5037,4766],{"class":3417},[3186,5039,4769],{"class":3206},[3186,5041,3564],{"class":3199},[3186,5043,3570],{"class":3206},[3186,5045,4776],{"class":3417},[3186,5047,3445],{"class":3206},[3186,5049,5050],{"class":3417},"existingOrder",[3186,5052,4026],{"class":3206},[3186,5054,4420],{"class":3417},[3186,5056,4787],{"class":3206},[3186,5058,5050],{"class":3417},[3186,5060,3485],{"class":3206},[3186,5062,5063],{"class":3188,"line":3828},[3186,5064,3737],{"class":3206},[3186,5066,5067],{"class":3188,"line":3833},[3186,5068,3498],{"emptyLinePlaceholder":3497},[3186,5070,5071,5073,5076,5079,5082,5084,5086,5088,5090,5093,5095,5098],{"class":3188,"line":3858},[3186,5072,3585],{"class":3199},[3186,5074,5075],{"class":3504}," using",[3186,5077,5078],{"class":3199}," var",[3186,5080,5081],{"class":3417}," tx",[3186,5083,3445],{"class":3206},[3186,5085,3448],{"class":3199},[3186,5087,3451],{"class":3417},[3186,5089,3080],{"class":3206},[3186,5091,5092],{"class":3417},"Database",[3186,5094,3080],{"class":3206},[3186,5096,5097],{"class":3407},"BeginTransactionAsync",[3186,5099,3651],{"class":3206},[3186,5101,5102],{"class":3188,"line":3898},[3186,5103,3498],{"emptyLinePlaceholder":3497},[3186,5105,5106,5108,5110,5112,5114,5116],{"class":3188,"line":3904},[3186,5107,3979],{"class":3199},[3186,5109,4693],{"class":3417},[3186,5111,3445],{"class":3206},[3186,5113,3564],{"class":3199},[3186,5115,4700],{"class":3403},[3186,5117,5118],{"class":3206}," { ... };\n",[3186,5120,5121,5123,5125,5127,5129,5131,5133,5135],{"class":3188,"line":4330},[3186,5122,3550],{"class":3417},[3186,5124,3080],{"class":3206},[3186,5126,4726],{"class":3417},[3186,5128,3080],{"class":3206},[3186,5130,3559],{"class":3407},[3186,5132,3411],{"class":3206},[3186,5134,4735],{"class":3417},[3186,5136,3485],{"class":3206},[3186,5138,5139,5141,5143,5145,5147],{"class":3188,"line":4335},[3186,5140,3585],{"class":3199},[3186,5142,3451],{"class":3417},[3186,5144,3080],{"class":3206},[3186,5146,3592],{"class":3407},[3186,5148,3651],{"class":3206},[3186,5150,5152],{"class":3188,"line":5151},26,[3186,5153,3498],{"emptyLinePlaceholder":3497},[3186,5155,5157],{"class":3188,"line":5156},27,[3186,5158,5159],{"class":3192},"    // Зберегти ключ разом з Id результату\n",[3186,5161,5163,5165,5167,5170,5172,5174,5176,5178],{"class":3188,"line":5162},28,[3186,5164,3550],{"class":3417},[3186,5166,3080],{"class":3206},[3186,5168,5169],{"class":3417},"IdempotencyKeys",[3186,5171,3080],{"class":3206},[3186,5173,3559],{"class":3407},[3186,5175,3411],{"class":3206},[3186,5177,3564],{"class":3199},[3186,5179,5180],{"class":3403}," IdempotencyKey\n",[3186,5182,5184],{"class":3188,"line":5183},29,[3186,5185,3719],{"class":3206},[3186,5187,5189,5192,5195,5197],{"class":3188,"line":5188},30,[3186,5190,5191],{"class":3417},"        Key",[3186,5193,5194],{"class":3206},"      = ",[3186,5196,4957],{"class":3417},[3186,5198,4865],{"class":3206},[3186,5200,5202,5205,5207,5209,5211,5213],{"class":3188,"line":5201},31,[3186,5203,5204],{"class":3417},"        ResultId",[3186,5206,3445],{"class":3206},[3186,5208,4735],{"class":3417},[3186,5210,3080],{"class":3206},[3186,5212,4420],{"class":3417},[3186,5214,4865],{"class":3206},[3186,5216,5218,5221,5223,5226,5228,5231,5233,5236,5238,5241],{"class":3188,"line":5217},32,[3186,5219,5220],{"class":3417},"        ExpiresAt",[3186,5222,3445],{"class":3206},[3186,5224,5225],{"class":3417},"DateTime",[3186,5227,3080],{"class":3206},[3186,5229,5230],{"class":3417},"UtcNow",[3186,5232,3080],{"class":3206},[3186,5234,5235],{"class":3407},"AddDays",[3186,5237,3411],{"class":3206},[3186,5239,5240],{"class":3874},"7",[3186,5242,3421],{"class":3206},[3186,5244,5246],{"class":3188,"line":5245},33,[3186,5247,5248],{"class":3206},"    });\n",[3186,5250,5252,5254,5256,5258,5260],{"class":3188,"line":5251},34,[3186,5253,3585],{"class":3199},[3186,5255,3451],{"class":3417},[3186,5257,3080],{"class":3206},[3186,5259,3592],{"class":3407},[3186,5261,3651],{"class":3206},[3186,5263,5265],{"class":3188,"line":5264},35,[3186,5266,3498],{"emptyLinePlaceholder":3497},[3186,5268,5270,5272,5274,5276,5279],{"class":3188,"line":5269},36,[3186,5271,3585],{"class":3199},[3186,5273,5081],{"class":3417},[3186,5275,3080],{"class":3206},[3186,5277,5278],{"class":3407},"CommitAsync",[3186,5280,3651],{"class":3206},[3186,5282,5284],{"class":3188,"line":5283},37,[3186,5285,3498],{"emptyLinePlaceholder":3497},[3186,5287,5289,5291,5293,5295,5297,5299,5301,5303,5305,5307,5309,5311,5313,5315,5317,5319,5321],{"class":3188,"line":5288},38,[3186,5290,3836],{"class":3504},[3186,5292,4756],{"class":3407},[3186,5294,3411],{"class":3206},[3186,5296,4761],{"class":3199},[3186,5298,3411],{"class":3206},[3186,5300,4766],{"class":3417},[3186,5302,4769],{"class":3206},[3186,5304,3564],{"class":3199},[3186,5306,3570],{"class":3206},[3186,5308,4776],{"class":3417},[3186,5310,3445],{"class":3206},[3186,5312,4735],{"class":3417},[3186,5314,3080],{"class":3206},[3186,5316,4420],{"class":3417},[3186,5318,4787],{"class":3206},[3186,5320,4735],{"class":3417},[3186,5322,3485],{"class":3206},[3186,5324,5326],{"class":3188,"line":5325},39,[3186,5327,3604],{"class":3206},[2996,5329],{},[2960,5331,5333],{"id":5332},"etag-pattern-для-rest-api","ETag Pattern для REST API",[2965,5335,5336,5337,5340,5341,5344,5345,5348],{},"HTTP стандарт визначає заголовок ",[2969,5338,5339],{},"ETag"," (Entity Tag) — унікальний ідентифікатор версії ресурсу. Браузери і клієнти можуть кешувати відповідь і при наступному запиті передавати ",[2969,5342,5343],{},"If-None-Match"," (для умовного GET) або ",[2969,5346,5347],{},"If-Match"," (для умовного PUT/DELETE). Це природний спосіб реалізувати Optimistic Concurrency у REST API без «протікання» деталей БД у клієнтський код.",[3003,5350,5352],{"id":5351},"як-etags-повязані-з-rowversion","Як ETags пов'язані з RowVersion",[2965,5354,5355,5357,5358,5361],{},[2969,5356,2975],{}," (байтовий масив) або ",[2969,5359,5360],{},"Version"," (Guid) — природні джерела ETag значення. Клієнт отримує ETag у відповіді, зберігає його і при PUT відправляє назад. Сервер порівнює з поточним значенням у БД:",[3017,5363,5365],{"className":3383,"code":5364,"language":3385,"meta":3025,"style":3025},"// Хелпер для перетворення RowVersion в ETag рядок\npublic static class ETagHelper\n{\n    // RowVersion byte[] → ETag рядок (Base64)\n    public static string ToETag(byte[] rowVersion)\n        => $\"\\\"{Convert.ToBase64String(rowVersion)}\\\"\";\n\n    // ETag рядок → RowVersion byte[]\n    public static byte[] FromETag(string etag)\n    {\n        var value = etag.Trim('\"');\n        return Convert.FromBase64String(value);\n    }\n\n    // Guid Version → ETag\n    public static string ToETag(Guid version)\n        => $\"\\\"{version:N}\\\"\";\n}\n",[2969,5366,5367,5372,5384,5388,5393,5419,5454,5458,5463,5486,5490,5514,5533,5537,5541,5546,5565,5591],{"__ignoreMap":3025},[3186,5368,5369],{"class":3188,"line":3189},[3186,5370,5371],{"class":3192},"// Хелпер для перетворення RowVersion в ETag рядок\n",[3186,5373,5374,5376,5378,5381],{"class":3188,"line":3196},[3186,5375,3397],{"class":3199},[3186,5377,3811],{"class":3199},[3186,5379,5380],{"class":3199}," class",[3186,5382,5383],{"class":3403}," ETagHelper\n",[3186,5385,5386],{"class":3188,"line":3424},[3186,5387,3427],{"class":3206},[3186,5389,5390],{"class":3188,"line":3430},[3186,5391,5392],{"class":3192},"    // RowVersion byte[] → ETag рядок (Base64)\n",[3186,5394,5395,5398,5400,5403,5406,5408,5411,5414,5417],{"class":3188,"line":3436},[3186,5396,5397],{"class":3199},"    public",[3186,5399,3811],{"class":3199},[3186,5401,5402],{"class":3199}," string",[3186,5404,5405],{"class":3407}," ToETag",[3186,5407,3411],{"class":3206},[3186,5409,5410],{"class":3199},"byte",[3186,5412,5413],{"class":3206},"[] ",[3186,5415,5416],{"class":3417},"rowVersion",[3186,5418,3421],{"class":3206},[3186,5420,5421,5424,5427,5431,5433,5436,5438,5441,5443,5445,5448,5450,5452],{"class":3188,"line":3488},[3186,5422,5423],{"class":3206},"        => ",[3186,5425,5426],{"class":3530},"$\"",[3186,5428,5430],{"class":5429},"sjcCO","\\\"",[3186,5432,4590],{"class":4589},[3186,5434,5435],{"class":3417},"Convert",[3186,5437,3080],{"class":4589},[3186,5439,5440],{"class":3407},"ToBase64String",[3186,5442,3411],{"class":4589},[3186,5444,5416],{"class":3417},[3186,5446,5447],{"class":4589},")}",[3186,5449,5430],{"class":5429},[3186,5451,4602],{"class":3530},[3186,5453,3219],{"class":3206},[3186,5455,5456],{"class":3188,"line":3494},[3186,5457,3498],{"emptyLinePlaceholder":3497},[3186,5459,5460],{"class":3188,"line":3501},[3186,5461,5462],{"class":3192},"    // ETag рядок → RowVersion byte[]\n",[3186,5464,5465,5467,5469,5472,5474,5477,5479,5481,5484],{"class":3188,"line":3516},[3186,5466,5397],{"class":3199},[3186,5468,3811],{"class":3199},[3186,5470,5471],{"class":3199}," byte",[3186,5473,5413],{"class":3206},[3186,5475,5476],{"class":3407},"FromETag",[3186,5478,3411],{"class":3206},[3186,5480,3414],{"class":3199},[3186,5482,5483],{"class":3417}," etag",[3186,5485,3421],{"class":3206},[3186,5487,5488],{"class":3188,"line":3536},[3186,5489,3719],{"class":3206},[3186,5491,5492,5494,5497,5499,5502,5504,5507,5509,5512],{"class":3188,"line":3541},[3186,5493,4158],{"class":3199},[3186,5495,5496],{"class":3417}," value",[3186,5498,3445],{"class":3206},[3186,5500,5501],{"class":3417},"etag",[3186,5503,3080],{"class":3206},[3186,5505,5506],{"class":3407},"Trim",[3186,5508,3411],{"class":3206},[3186,5510,5511],{"class":3530},"'\"'",[3186,5513,3485],{"class":3206},[3186,5515,5516,5518,5521,5523,5526,5528,5531],{"class":3188,"line":3547},[3186,5517,5027],{"class":3504},[3186,5519,5520],{"class":3417}," Convert",[3186,5522,3080],{"class":3206},[3186,5524,5525],{"class":3407},"FromBase64String",[3186,5527,3411],{"class":3206},[3186,5529,5530],{"class":3417},"value",[3186,5532,3485],{"class":3206},[3186,5534,5535],{"class":3188,"line":3582},[3186,5536,3737],{"class":3206},[3186,5538,5539],{"class":3188,"line":3601},[3186,5540,3498],{"emptyLinePlaceholder":3497},[3186,5542,5543],{"class":3188,"line":3790},[3186,5544,5545],{"class":3192},"    // Guid Version → ETag\n",[3186,5547,5548,5550,5552,5554,5556,5558,5560,5563],{"class":3188,"line":3795},[3186,5549,5397],{"class":3199},[3186,5551,3811],{"class":3199},[3186,5553,5402],{"class":3199},[3186,5555,5405],{"class":3407},[3186,5557,3411],{"class":3206},[3186,5559,4889],{"class":3403},[3186,5561,5562],{"class":3417}," version",[3186,5564,3421],{"class":3206},[3186,5566,5567,5569,5571,5573,5575,5578,5580,5583,5585,5587,5589],{"class":3188,"line":3800},[3186,5568,5423],{"class":3206},[3186,5570,5426],{"class":3530},[3186,5572,5430],{"class":5429},[3186,5574,4590],{"class":4589},[3186,5576,5577],{"class":3417},"version",[3186,5579,4099],{"class":3206},[3186,5581,5582],{"class":3417},"N",[3186,5584,4599],{"class":4589},[3186,5586,5430],{"class":5429},[3186,5588,4602],{"class":3530},[3186,5590,3219],{"class":3206},[3186,5592,5593],{"class":3188,"line":3805},[3186,5594,3604],{"class":3206},[3003,5596,5598],{"id":5597},"get-відповідь-з-etag","GET: відповідь з ETag",[3017,5600,5602],{"className":3383,"code":5601,"language":3385,"meta":3025,"style":3025},"[HttpGet(\"{id}\")]\npublic async Task\u003CIActionResult> GetProduct(int id)\n{\n    var product = await context.Products\n        .AsNoTracking()\n        .FirstOrDefaultAsync(p => p.Id == id);\n\n    if (product is null) return NotFound();\n\n    var etag = ETagHelper.ToETag(product.RowVersion);\n\n    // Умовний GET: якщо ETag не змінився — 304 Not Modified\n    if (Request.Headers.TryGetValue(\"If-None-Match\", out var ifNoneMatch)\n        && ifNoneMatch == etag)\n    {\n        return StatusCode(304); // Not Modified\n    }\n\n    Response.Headers.ETag = etag;\n\n    return Ok(new ProductDto\n    {\n        Id    = product.Id,\n        Name  = product.Name,\n        Price = product.Price,\n        // Не передаємо RowVersion напряму — він в ETag заголовку\n    });\n}\n",[2969,5603,5604,5618,5644,5648,5664,5672,5696,5700,5722,5726,5752,5756,5761,5797,5811,5815,5832,5836,5840,5859,5863,5877,5881,5897,5913,5929,5934,5938],{"__ignoreMap":3025},[3186,5605,5606,5608,5611,5613,5616],{"class":3188,"line":3189},[3186,5607,4641],{"class":3206},[3186,5609,5610],{"class":3403},"HttpGet",[3186,5612,3411],{"class":3206},[3186,5614,5615],{"class":3530},"\"{id}\"",[3186,5617,4652],{"class":3206},[3186,5619,5620,5622,5624,5626,5628,5630,5632,5635,5637,5639,5642],{"class":3188,"line":3196},[3186,5621,3397],{"class":3199},[3186,5623,3400],{"class":3199},[3186,5625,3404],{"class":3403},[3186,5627,4663],{"class":3206},[3186,5629,4666],{"class":3403},[3186,5631,4669],{"class":3206},[3186,5633,5634],{"class":3407},"GetProduct",[3186,5636,3411],{"class":3206},[3186,5638,3957],{"class":3199},[3186,5640,5641],{"class":3417}," id",[3186,5643,3421],{"class":3206},[3186,5645,5646],{"class":3188,"line":3424},[3186,5647,3427],{"class":3206},[3186,5649,5650,5652,5654,5656,5658,5660,5662],{"class":3188,"line":3430},[3186,5651,3979],{"class":3199},[3186,5653,3982],{"class":3417},[3186,5655,3445],{"class":3206},[3186,5657,3448],{"class":3199},[3186,5659,3451],{"class":3417},[3186,5661,3080],{"class":3206},[3186,5663,4399],{"class":3417},[3186,5665,5666,5668,5670],{"class":3188,"line":3436},[3186,5667,4404],{"class":3206},[3186,5669,4928],{"class":3407},[3186,5671,4931],{"class":3206},[3186,5673,5674,5676,5678,5680,5682,5684,5686,5688,5690,5692,5694],{"class":3188,"line":3488},[3186,5675,4404],{"class":3206},[3186,5677,4938],{"class":3407},[3186,5679,3411],{"class":3206},[3186,5681,2965],{"class":3417},[3186,5683,3469],{"class":3206},[3186,5685,2965],{"class":3417},[3186,5687,3080],{"class":3206},[3186,5689,4420],{"class":3417},[3186,5691,3479],{"class":3206},[3186,5693,4776],{"class":3417},[3186,5695,3485],{"class":3206},[3186,5697,5698],{"class":3188,"line":3494},[3186,5699,3498],{"emptyLinePlaceholder":3497},[3186,5701,5702,5704,5706,5708,5710,5712,5714,5717,5720],{"class":3188,"line":3501},[3186,5703,3505],{"class":3504},[3186,5705,3508],{"class":3206},[3186,5707,4023],{"class":3417},[3186,5709,3846],{"class":3199},[3186,5711,4561],{"class":3199},[3186,5713,3753],{"class":3206},[3186,5715,5716],{"class":3504},"return",[3186,5718,5719],{"class":3407}," NotFound",[3186,5721,3651],{"class":3206},[3186,5723,5724],{"class":3188,"line":3516},[3186,5725,3498],{"emptyLinePlaceholder":3497},[3186,5727,5728,5730,5732,5734,5737,5739,5742,5744,5746,5748,5750],{"class":3188,"line":3536},[3186,5729,3979],{"class":3199},[3186,5731,5483],{"class":3417},[3186,5733,3445],{"class":3206},[3186,5735,5736],{"class":3417},"ETagHelper",[3186,5738,3080],{"class":3206},[3186,5740,5741],{"class":3407},"ToETag",[3186,5743,3411],{"class":3206},[3186,5745,4023],{"class":3417},[3186,5747,3080],{"class":3206},[3186,5749,2975],{"class":3417},[3186,5751,3485],{"class":3206},[3186,5753,5754],{"class":3188,"line":3541},[3186,5755,3498],{"emptyLinePlaceholder":3497},[3186,5757,5758],{"class":3188,"line":3547},[3186,5759,5760],{"class":3192},"    // Умовний GET: якщо ETag не змінився — 304 Not Modified\n",[3186,5762,5763,5765,5767,5770,5772,5775,5777,5780,5782,5785,5787,5790,5792,5795],{"class":3188,"line":3582},[3186,5764,3505],{"class":3504},[3186,5766,3508],{"class":3206},[3186,5768,5769],{"class":3417},"Request",[3186,5771,3080],{"class":3206},[3186,5773,5774],{"class":3417},"Headers",[3186,5776,3080],{"class":3206},[3186,5778,5779],{"class":3407},"TryGetValue",[3186,5781,3411],{"class":3206},[3186,5783,5784],{"class":3530},"\"If-None-Match\"",[3186,5786,3963],{"class":3206},[3186,5788,5789],{"class":3199},"out",[3186,5791,5078],{"class":3199},[3186,5793,5794],{"class":3417}," ifNoneMatch",[3186,5796,3421],{"class":3206},[3186,5798,5799,5802,5805,5807,5809],{"class":3188,"line":3601},[3186,5800,5801],{"class":3206},"        && ",[3186,5803,5804],{"class":3417},"ifNoneMatch",[3186,5806,3479],{"class":3206},[3186,5808,5501],{"class":3417},[3186,5810,3421],{"class":3206},[3186,5812,5813],{"class":3188,"line":3790},[3186,5814,3719],{"class":3206},[3186,5816,5817,5819,5822,5824,5827,5829],{"class":3188,"line":3795},[3186,5818,5027],{"class":3504},[3186,5820,5821],{"class":3407}," StatusCode",[3186,5823,3411],{"class":3206},[3186,5825,5826],{"class":3874},"304",[3186,5828,3892],{"class":3206},[3186,5830,5831],{"class":3192},"// Not Modified\n",[3186,5833,5834],{"class":3188,"line":3800},[3186,5835,3737],{"class":3206},[3186,5837,5838],{"class":3188,"line":3805},[3186,5839,3498],{"emptyLinePlaceholder":3497},[3186,5841,5842,5845,5847,5849,5851,5853,5855,5857],{"class":3188,"line":3828},[3186,5843,5844],{"class":3417},"    Response",[3186,5846,3080],{"class":3206},[3186,5848,5774],{"class":3417},[3186,5850,3080],{"class":3206},[3186,5852,5339],{"class":3417},[3186,5854,3445],{"class":3206},[3186,5856,5501],{"class":3417},[3186,5858,3219],{"class":3206},[3186,5860,5861],{"class":3188,"line":3833},[3186,5862,3498],{"emptyLinePlaceholder":3497},[3186,5864,5865,5867,5870,5872,5874],{"class":3188,"line":3858},[3186,5866,3836],{"class":3504},[3186,5868,5869],{"class":3407}," Ok",[3186,5871,3411],{"class":3206},[3186,5873,3564],{"class":3199},[3186,5875,5876],{"class":3403}," ProductDto\n",[3186,5878,5879],{"class":3188,"line":3898},[3186,5880,3719],{"class":3206},[3186,5882,5883,5886,5889,5891,5893,5895],{"class":3188,"line":3904},[3186,5884,5885],{"class":3417},"        Id",[3186,5887,5888],{"class":3206},"    = ",[3186,5890,4023],{"class":3417},[3186,5892,3080],{"class":3206},[3186,5894,4420],{"class":3417},[3186,5896,4865],{"class":3206},[3186,5898,5899,5902,5905,5907,5909,5911],{"class":3188,"line":4330},[3186,5900,5901],{"class":3417},"        Name",[3186,5903,5904],{"class":3206},"  = ",[3186,5906,4023],{"class":3417},[3186,5908,3080],{"class":3206},[3186,5910,4878],{"class":3417},[3186,5912,4865],{"class":3206},[3186,5914,5915,5918,5920,5922,5924,5927],{"class":3188,"line":4335},[3186,5916,5917],{"class":3417},"        Price",[3186,5919,3445],{"class":3206},[3186,5921,4023],{"class":3417},[3186,5923,3080],{"class":3206},[3186,5925,5926],{"class":3417},"Price",[3186,5928,4865],{"class":3206},[3186,5930,5931],{"class":3188,"line":5151},[3186,5932,5933],{"class":3192},"        // Не передаємо RowVersion напряму — він в ETag заголовку\n",[3186,5935,5936],{"class":3188,"line":5156},[3186,5937,5248],{"class":3206},[3186,5939,5940],{"class":3188,"line":5162},[3186,5941,3604],{"class":3206},[3003,5943,5945],{"id":5944},"put-з-if-match-умовне-оновлення","PUT з If-Match: умовне оновлення",[3017,5947,5949],{"className":3383,"code":5948,"language":3385,"meta":3025,"style":3025},"[HttpPut(\"{id}\")]\npublic async Task\u003CIActionResult> UpdateProduct(int id, UpdateProductDto dto)\n{\n    // 1. Перевірити наявність If-Match заголовку\n    if (!Request.Headers.TryGetValue(\"If-Match\", out var ifMatch))\n        return StatusCode(428, \"If-Match header required\"); // 428 Precondition Required\n\n    // 2. Завантажити entity\n    var product = await context.Products.FindAsync(id);\n    if (product is null) return NotFound();\n\n    // 3. Порівняти ETag з поточним RowVersion\n    var currentETag = ETagHelper.ToETag(product.RowVersion);\n    if (ifMatch != currentETag)\n        return StatusCode(412, \"Precondition Failed — resource was modified\"); // 412\n\n    // 4. Застосувати зміни\n    product.Name  = dto.Name;\n    product.Price = dto.Price;\n\n    try\n    {\n        await context.SaveChangesAsync();\n        // RowVersion оновлюється автоматично сервером\n\n        Response.Headers.ETag = ETagHelper.ToETag(product.RowVersion);\n        return Ok(); // або 204 No Content\n    }\n    catch (DbUpdateConcurrencyException)\n    {\n        // Конкурентна зміна між перевіркою і збереженням (race condition edge case)\n        return StatusCode(412, \"Concurrent modification detected\");\n    }\n}\n",[2969,5950,5951,5964,5996,6000,6005,6038,6059,6063,6068,6094,6114,6118,6123,6148,6165,6186,6190,6195,6213,6231,6235,6239,6243,6255,6260,6264,6295,6306,6310,6320,6324,6329,6346,6350],{"__ignoreMap":3025},[3186,5952,5953,5955,5958,5960,5962],{"class":3188,"line":3189},[3186,5954,4641],{"class":3206},[3186,5956,5957],{"class":3403},"HttpPut",[3186,5959,3411],{"class":3206},[3186,5961,5615],{"class":3530},[3186,5963,4652],{"class":3206},[3186,5965,5966,5968,5970,5972,5974,5976,5978,5981,5983,5985,5987,5989,5992,5994],{"class":3188,"line":3196},[3186,5967,3397],{"class":3199},[3186,5969,3400],{"class":3199},[3186,5971,3404],{"class":3403},[3186,5973,4663],{"class":3206},[3186,5975,4666],{"class":3403},[3186,5977,4669],{"class":3206},[3186,5979,5980],{"class":3407},"UpdateProduct",[3186,5982,3411],{"class":3206},[3186,5984,3957],{"class":3199},[3186,5986,5641],{"class":3417},[3186,5988,3963],{"class":3206},[3186,5990,5991],{"class":3403},"UpdateProductDto",[3186,5993,4680],{"class":3417},[3186,5995,3421],{"class":3206},[3186,5997,5998],{"class":3188,"line":3424},[3186,5999,3427],{"class":3206},[3186,6001,6002],{"class":3188,"line":3430},[3186,6003,6004],{"class":3192},"    // 1. Перевірити наявність If-Match заголовку\n",[3186,6006,6007,6009,6012,6014,6016,6018,6020,6022,6024,6027,6029,6031,6033,6036],{"class":3188,"line":3436},[3186,6008,3505],{"class":3504},[3186,6010,6011],{"class":3206}," (!",[3186,6013,5769],{"class":3417},[3186,6015,3080],{"class":3206},[3186,6017,5774],{"class":3417},[3186,6019,3080],{"class":3206},[3186,6021,5779],{"class":3407},[3186,6023,3411],{"class":3206},[3186,6025,6026],{"class":3530},"\"If-Match\"",[3186,6028,3963],{"class":3206},[3186,6030,5789],{"class":3199},[3186,6032,5078],{"class":3199},[3186,6034,6035],{"class":3417}," ifMatch",[3186,6037,3769],{"class":3206},[3186,6039,6040,6042,6044,6046,6049,6051,6054,6056],{"class":3188,"line":3488},[3186,6041,5027],{"class":3504},[3186,6043,5821],{"class":3407},[3186,6045,3411],{"class":3206},[3186,6047,6048],{"class":3874},"428",[3186,6050,3963],{"class":3206},[3186,6052,6053],{"class":3530},"\"If-Match header required\"",[3186,6055,3892],{"class":3206},[3186,6057,6058],{"class":3192},"// 428 Precondition Required\n",[3186,6060,6061],{"class":3188,"line":3494},[3186,6062,3498],{"emptyLinePlaceholder":3497},[3186,6064,6065],{"class":3188,"line":3501},[3186,6066,6067],{"class":3192},"    // 2. Завантажити entity\n",[3186,6069,6070,6072,6074,6076,6078,6080,6082,6084,6086,6088,6090,6092],{"class":3188,"line":3516},[3186,6071,3979],{"class":3199},[3186,6073,3982],{"class":3417},[3186,6075,3445],{"class":3206},[3186,6077,3448],{"class":3199},[3186,6079,3451],{"class":3417},[3186,6081,3080],{"class":3206},[3186,6083,3993],{"class":3417},[3186,6085,3080],{"class":3206},[3186,6087,3998],{"class":3407},[3186,6089,3411],{"class":3206},[3186,6091,4776],{"class":3417},[3186,6093,3485],{"class":3206},[3186,6095,6096,6098,6100,6102,6104,6106,6108,6110,6112],{"class":3188,"line":3536},[3186,6097,3505],{"class":3504},[3186,6099,3508],{"class":3206},[3186,6101,4023],{"class":3417},[3186,6103,3846],{"class":3199},[3186,6105,4561],{"class":3199},[3186,6107,3753],{"class":3206},[3186,6109,5716],{"class":3504},[3186,6111,5719],{"class":3407},[3186,6113,3651],{"class":3206},[3186,6115,6116],{"class":3188,"line":3541},[3186,6117,3498],{"emptyLinePlaceholder":3497},[3186,6119,6120],{"class":3188,"line":3547},[3186,6121,6122],{"class":3192},"    // 3. Порівняти ETag з поточним RowVersion\n",[3186,6124,6125,6127,6130,6132,6134,6136,6138,6140,6142,6144,6146],{"class":3188,"line":3582},[3186,6126,3979],{"class":3199},[3186,6128,6129],{"class":3417}," currentETag",[3186,6131,3445],{"class":3206},[3186,6133,5736],{"class":3417},[3186,6135,3080],{"class":3206},[3186,6137,5741],{"class":3407},[3186,6139,3411],{"class":3206},[3186,6141,4023],{"class":3417},[3186,6143,3080],{"class":3206},[3186,6145,2975],{"class":3417},[3186,6147,3485],{"class":3206},[3186,6149,6150,6152,6154,6157,6160,6163],{"class":3188,"line":3601},[3186,6151,3505],{"class":3504},[3186,6153,3508],{"class":3206},[3186,6155,6156],{"class":3417},"ifMatch",[3186,6158,6159],{"class":3206}," != ",[3186,6161,6162],{"class":3417},"currentETag",[3186,6164,3421],{"class":3206},[3186,6166,6167,6169,6171,6173,6176,6178,6181,6183],{"class":3188,"line":3790},[3186,6168,5027],{"class":3504},[3186,6170,5821],{"class":3407},[3186,6172,3411],{"class":3206},[3186,6174,6175],{"class":3874},"412",[3186,6177,3963],{"class":3206},[3186,6179,6180],{"class":3530},"\"Precondition Failed — resource was modified\"",[3186,6182,3892],{"class":3206},[3186,6184,6185],{"class":3192},"// 412\n",[3186,6187,6188],{"class":3188,"line":3795},[3186,6189,3498],{"emptyLinePlaceholder":3497},[3186,6191,6192],{"class":3188,"line":3800},[3186,6193,6194],{"class":3192},"    // 4. Застосувати зміни\n",[3186,6196,6197,6199,6201,6203,6205,6207,6209,6211],{"class":3188,"line":3805},[3186,6198,4057],{"class":3417},[3186,6200,3080],{"class":3206},[3186,6202,4878],{"class":3417},[3186,6204,5904],{"class":3206},[3186,6206,4710],{"class":3417},[3186,6208,3080],{"class":3206},[3186,6210,4878],{"class":3417},[3186,6212,3219],{"class":3206},[3186,6214,6215,6217,6219,6221,6223,6225,6227,6229],{"class":3188,"line":3828},[3186,6216,4057],{"class":3417},[3186,6218,3080],{"class":3206},[3186,6220,5926],{"class":3417},[3186,6222,3445],{"class":3206},[3186,6224,4710],{"class":3417},[3186,6226,3080],{"class":3206},[3186,6228,5926],{"class":3417},[3186,6230,3219],{"class":3206},[3186,6232,6233],{"class":3188,"line":3833},[3186,6234,3498],{"emptyLinePlaceholder":3497},[3186,6236,6237],{"class":3188,"line":3858},[3186,6238,3714],{"class":3504},[3186,6240,6241],{"class":3188,"line":3898},[3186,6242,3719],{"class":3206},[3186,6244,6245,6247,6249,6251,6253],{"class":3188,"line":3904},[3186,6246,3724],{"class":3199},[3186,6248,3451],{"class":3417},[3186,6250,3080],{"class":3206},[3186,6252,3592],{"class":3407},[3186,6254,3651],{"class":3206},[3186,6256,6257],{"class":3188,"line":4330},[3186,6258,6259],{"class":3192},"        // RowVersion оновлюється автоматично сервером\n",[3186,6261,6262],{"class":3188,"line":4335},[3186,6263,3498],{"emptyLinePlaceholder":3497},[3186,6265,6266,6269,6271,6273,6275,6277,6279,6281,6283,6285,6287,6289,6291,6293],{"class":3188,"line":5151},[3186,6267,6268],{"class":3417},"        Response",[3186,6270,3080],{"class":3206},[3186,6272,5774],{"class":3417},[3186,6274,3080],{"class":3206},[3186,6276,5339],{"class":3417},[3186,6278,3445],{"class":3206},[3186,6280,5736],{"class":3417},[3186,6282,3080],{"class":3206},[3186,6284,5741],{"class":3407},[3186,6286,3411],{"class":3206},[3186,6288,4023],{"class":3417},[3186,6290,3080],{"class":3206},[3186,6292,2975],{"class":3417},[3186,6294,3485],{"class":3206},[3186,6296,6297,6299,6301,6303],{"class":3188,"line":5156},[3186,6298,5027],{"class":3504},[3186,6300,5869],{"class":3407},[3186,6302,3595],{"class":3206},[3186,6304,6305],{"class":3192},"// або 204 No Content\n",[3186,6307,6308],{"class":3188,"line":5162},[3186,6309,3737],{"class":3206},[3186,6311,6312,6314,6316,6318],{"class":3188,"line":5183},[3186,6313,3742],{"class":3504},[3186,6315,3508],{"class":3206},[3186,6317,4285],{"class":3403},[3186,6319,3421],{"class":3206},[3186,6321,6322],{"class":3188,"line":5188},[3186,6323,3719],{"class":3206},[3186,6325,6326],{"class":3188,"line":5201},[3186,6327,6328],{"class":3192},"        // Конкурентна зміна між перевіркою і збереженням (race condition edge case)\n",[3186,6330,6331,6333,6335,6337,6339,6341,6344],{"class":3188,"line":5217},[3186,6332,5027],{"class":3504},[3186,6334,5821],{"class":3407},[3186,6336,3411],{"class":3206},[3186,6338,6175],{"class":3874},[3186,6340,3963],{"class":3206},[3186,6342,6343],{"class":3530},"\"Concurrent modification detected\"",[3186,6345,3485],{"class":3206},[3186,6347,6348],{"class":3188,"line":5245},[3186,6349,3737],{"class":3206},[3186,6351,6352],{"class":3188,"line":5251},[3186,6353,3604],{"class":3206},[3003,6355,6357],{"id":6356},"delete-з-if-match-захист-від-видалення-застарілого-ресурсу","DELETE з If-Match: захист від видалення застарілого ресурсу",[3017,6359,6361],{"className":3383,"code":6360,"language":3385,"meta":3025,"style":3025},"[HttpDelete(\"{id}\")]\npublic async Task\u003CIActionResult> DeleteProduct(int id)\n{\n    if (!Request.Headers.TryGetValue(\"If-Match\", out var ifMatch))\n        return StatusCode(428, \"If-Match header required\");\n\n    var product = await context.Products.FindAsync(id);\n    if (product is null) return NotFound();\n\n    if (ETagHelper.ToETag(product.RowVersion) != ifMatch)\n        return StatusCode(412, \"Resource version mismatch\");\n\n    context.Products.Remove(product);\n    await context.SaveChangesAsync();\n    return NoContent(); // 204\n}\n",[2969,6362,6363,6376,6401,6405,6435,6451,6455,6481,6501,6505,6532,6549,6553,6572,6584,6596],{"__ignoreMap":3025},[3186,6364,6365,6367,6370,6372,6374],{"class":3188,"line":3189},[3186,6366,4641],{"class":3206},[3186,6368,6369],{"class":3403},"HttpDelete",[3186,6371,3411],{"class":3206},[3186,6373,5615],{"class":3530},[3186,6375,4652],{"class":3206},[3186,6377,6378,6380,6382,6384,6386,6388,6390,6393,6395,6397,6399],{"class":3188,"line":3196},[3186,6379,3397],{"class":3199},[3186,6381,3400],{"class":3199},[3186,6383,3404],{"class":3403},[3186,6385,4663],{"class":3206},[3186,6387,4666],{"class":3403},[3186,6389,4669],{"class":3206},[3186,6391,6392],{"class":3407},"DeleteProduct",[3186,6394,3411],{"class":3206},[3186,6396,3957],{"class":3199},[3186,6398,5641],{"class":3417},[3186,6400,3421],{"class":3206},[3186,6402,6403],{"class":3188,"line":3424},[3186,6404,3427],{"class":3206},[3186,6406,6407,6409,6411,6413,6415,6417,6419,6421,6423,6425,6427,6429,6431,6433],{"class":3188,"line":3430},[3186,6408,3505],{"class":3504},[3186,6410,6011],{"class":3206},[3186,6412,5769],{"class":3417},[3186,6414,3080],{"class":3206},[3186,6416,5774],{"class":3417},[3186,6418,3080],{"class":3206},[3186,6420,5779],{"class":3407},[3186,6422,3411],{"class":3206},[3186,6424,6026],{"class":3530},[3186,6426,3963],{"class":3206},[3186,6428,5789],{"class":3199},[3186,6430,5078],{"class":3199},[3186,6432,6035],{"class":3417},[3186,6434,3769],{"class":3206},[3186,6436,6437,6439,6441,6443,6445,6447,6449],{"class":3188,"line":3436},[3186,6438,5027],{"class":3504},[3186,6440,5821],{"class":3407},[3186,6442,3411],{"class":3206},[3186,6444,6048],{"class":3874},[3186,6446,3963],{"class":3206},[3186,6448,6053],{"class":3530},[3186,6450,3485],{"class":3206},[3186,6452,6453],{"class":3188,"line":3488},[3186,6454,3498],{"emptyLinePlaceholder":3497},[3186,6456,6457,6459,6461,6463,6465,6467,6469,6471,6473,6475,6477,6479],{"class":3188,"line":3494},[3186,6458,3979],{"class":3199},[3186,6460,3982],{"class":3417},[3186,6462,3445],{"class":3206},[3186,6464,3448],{"class":3199},[3186,6466,3451],{"class":3417},[3186,6468,3080],{"class":3206},[3186,6470,3993],{"class":3417},[3186,6472,3080],{"class":3206},[3186,6474,3998],{"class":3407},[3186,6476,3411],{"class":3206},[3186,6478,4776],{"class":3417},[3186,6480,3485],{"class":3206},[3186,6482,6483,6485,6487,6489,6491,6493,6495,6497,6499],{"class":3188,"line":3501},[3186,6484,3505],{"class":3504},[3186,6486,3508],{"class":3206},[3186,6488,4023],{"class":3417},[3186,6490,3846],{"class":3199},[3186,6492,4561],{"class":3199},[3186,6494,3753],{"class":3206},[3186,6496,5716],{"class":3504},[3186,6498,5719],{"class":3407},[3186,6500,3651],{"class":3206},[3186,6502,6503],{"class":3188,"line":3516},[3186,6504,3498],{"emptyLinePlaceholder":3497},[3186,6506,6507,6509,6511,6513,6515,6517,6519,6521,6523,6525,6528,6530],{"class":3188,"line":3536},[3186,6508,3505],{"class":3504},[3186,6510,3508],{"class":3206},[3186,6512,5736],{"class":3417},[3186,6514,3080],{"class":3206},[3186,6516,5741],{"class":3407},[3186,6518,3411],{"class":3206},[3186,6520,4023],{"class":3417},[3186,6522,3080],{"class":3206},[3186,6524,2975],{"class":3417},[3186,6526,6527],{"class":3206},") != ",[3186,6529,6156],{"class":3417},[3186,6531,3421],{"class":3206},[3186,6533,6534,6536,6538,6540,6542,6544,6547],{"class":3188,"line":3541},[3186,6535,5027],{"class":3504},[3186,6537,5821],{"class":3407},[3186,6539,3411],{"class":3206},[3186,6541,6175],{"class":3874},[3186,6543,3963],{"class":3206},[3186,6545,6546],{"class":3530},"\"Resource version mismatch\"",[3186,6548,3485],{"class":3206},[3186,6550,6551],{"class":3188,"line":3547},[3186,6552,3498],{"emptyLinePlaceholder":3497},[3186,6554,6555,6557,6559,6561,6563,6566,6568,6570],{"class":3188,"line":3582},[3186,6556,3550],{"class":3417},[3186,6558,3080],{"class":3206},[3186,6560,3993],{"class":3417},[3186,6562,3080],{"class":3206},[3186,6564,6565],{"class":3407},"Remove",[3186,6567,3411],{"class":3206},[3186,6569,4023],{"class":3417},[3186,6571,3485],{"class":3206},[3186,6573,6574,6576,6578,6580,6582],{"class":3188,"line":3601},[3186,6575,3585],{"class":3199},[3186,6577,3451],{"class":3417},[3186,6579,3080],{"class":3206},[3186,6581,3592],{"class":3407},[3186,6583,3651],{"class":3206},[3186,6585,6586,6588,6591,6593],{"class":3188,"line":3790},[3186,6587,3836],{"class":3504},[3186,6589,6590],{"class":3407}," NoContent",[3186,6592,3595],{"class":3206},[3186,6594,6595],{"class":3192},"// 204\n",[3186,6597,6598],{"class":3188,"line":3795},[3186,6599,3604],{"class":3206},[6601,6602,6603,6606,6607,6609,6610,6612,6613,6616],"tip",{},[2978,6604,6605],{},"ETag переваги",": Клієнт не знає нічого про ",[2969,6608,2975],{}," чи ",[2969,6611,4889],{}," — він просто зберігає непрозорий рядок. HTTP стандарт чітко визначає семантику ",[2969,6614,6615],{},"412 Precondition Failed",". Браузерний кеш автоматично використовує ETags для умовних GET — безкоштовна оптимізація.",[2996,6618],{},[2960,6620,6622],{"id":6621},"real-world-сценарії-конкурентності","Real-world сценарії конкурентності",[3003,6624,6626],{"id":6625},"сценарій-1-booking-system-бронювання","Сценарій 1: Booking System (бронювання)",[2965,6628,6629],{},"Система бронювання готельних номерів — класичний high-contention сценарій. Той самий номер може намагатись забронювати десяток клієнтів одночасно:",[3017,6631,6633],{"className":3383,"code":6632,"language":3385,"meta":3025,"style":3025},"public class RoomBookingService\n{\n    private readonly AppDbContext _context;\n\n    // Наївна реалізація — race condition!\n    public async Task\u003CBooking> BookRoomNaiveAsync(\n        int roomId, DateOnly checkIn, DateOnly checkOut, int guestId)\n    {\n        // ❌ Check-Then-Act: між AnyAsync і Add → конфлікт!\n        var isAvailable = !await _context.Bookings.AnyAsync(b =>\n            b.RoomId      == roomId &&\n            b.CheckIn     \u003C checkOut &&\n            b.CheckOut    > checkIn &&\n            b.Status      != \"Cancelled\");\n\n        if (!isAvailable) throw new RoomNotAvailableException();\n\n        var booking = new Booking\n        {\n            RoomId    = roomId,\n            GuestId   = guestId,\n            CheckIn   = checkIn,\n            CheckOut  = checkOut,\n            Status    = \"Confirmed\"\n        };\n        _context.Bookings.Add(booking);\n        await _context.SaveChangesAsync();\n        return booking;\n    }\n\n    // ✅ Правильна реалізація: Unique Constraint + Exception handling\n    public async Task\u003CBooking> BookRoomSafeAsync(\n        int roomId, DateOnly checkIn, DateOnly checkOut, int guestId)\n    {\n        // Без попередньої перевірки — покладаємось на UNIQUE CONSTRAINT:\n        // ALTER TABLE Rooms ADD CONSTRAINT no_overlap\n        //   EXCLUDE USING gist (RoomId WITH =, daterange(CheckIn, CheckOut) WITH &&)\n        // (PostgreSQL: Exclusion Constraint для діапазонів)\n        // SQL Server: через тригер або CHECK CONSTRAINT + INDEX\n\n        var booking = new Booking\n        {\n            RoomId    = roomId,\n            GuestId   = guestId,\n            CheckIn   = checkIn,\n            CheckOut  = checkOut,\n            Status    = \"Confirmed\"\n        };\n\n        _context.Bookings.Add(booking);\n\n        try\n        {\n            await _context.SaveChangesAsync();\n            return booking;\n        }\n        catch (DbUpdateException ex) when (IsOverlapConstraintViolation(ex))\n        {\n            throw new RoomNotAvailableException(\n                $\"Room {roomId} is already booked for {checkIn:d}–{checkOut:d}\");\n        }\n    }\n\n    // Альтернатива: Pessimistic Lock для room\n    public async Task\u003CBooking> BookRoomWithLockAsync(\n        int roomId, DateOnly checkIn, DateOnly checkOut, int guestId)\n    {\n        await using var tx = await _context.Database.BeginTransactionAsync(\n            IsolationLevel.RepeatableRead);\n\n        // Блокуємо Room на рівні рядка\n        var room = await _context.Rooms\n            .FromSqlRaw(\"SELECT * FROM Rooms WITH (UPDLOCK, ROWLOCK) WHERE Id = {0}\", roomId)\n            .FirstOrDefaultAsync();\n\n        if (room is null) throw new NotFoundException();\n\n        // Тепер можна перевіряти без race condition (інші чекають блокування)\n        var isAvailable = !await _context.Bookings.AnyAsync(b =>\n            b.RoomId  == roomId &&\n            b.CheckIn  \u003C checkOut &&\n            b.CheckOut > checkIn &&\n            b.Status  != \"Cancelled\");\n\n        if (!isAvailable)\n        {\n            await tx.RollbackAsync();\n            throw new RoomNotAvailableException();\n        }\n\n        var booking = new Booking { RoomId = roomId, GuestId = guestId,\n                                     CheckIn = checkIn, CheckOut = checkOut };\n        _context.Bookings.Add(booking);\n        await _context.SaveChangesAsync();\n        await tx.CommitAsync();\n        return booking;\n    }\n\n    private static bool IsOverlapConstraintViolation(DbUpdateException ex)\n        => ex.InnerException?.Message.Contains(\"no_overlap\") == true ||\n           ex.InnerException?.Message.Contains(\"IX_Bookings\") == true;\n}\n",[2969,6634,6635,6644,6648,6664,6668,6673,6693,6725,6729,6734,6765,6783,6800,6817,6834,6838,6858,6862,6876,6880,6891,6904,6915,6926,6936,6941,6961,6973,6981,6985,6989,6994,7013,7039,7043,7048,7053,7058,7063,7068,7073,7086,7091,7102,7113,7124,7135,7144,7149,7154,7173,7178,7183,7188,7201,7210,7215,7241,7246,7257,7300,7305,7310,7315,7321,7341,7368,7373,7400,7412,7417,7423,7442,7462,7471,7476,7500,7505,7511,7538,7554,7570,7586,7602,7607,7618,7623,7637,7648,7653,7658,7691,7712,7731,7744,7757,7766,7771,7776,7796,7831,7860],{"__ignoreMap":3025},[3186,6636,6637,6639,6641],{"class":3188,"line":3189},[3186,6638,3397],{"class":3199},[3186,6640,5380],{"class":3199},[3186,6642,6643],{"class":3403}," RoomBookingService\n",[3186,6645,6646],{"class":3188,"line":3196},[3186,6647,3427],{"class":3206},[3186,6649,6650,6653,6656,6659,6662],{"class":3188,"line":3424},[3186,6651,6652],{"class":3199},"    private",[3186,6654,6655],{"class":3199}," readonly",[3186,6657,6658],{"class":3403}," AppDbContext",[3186,6660,6661],{"class":3417}," _context",[3186,6663,3219],{"class":3206},[3186,6665,6666],{"class":3188,"line":3430},[3186,6667,3498],{"emptyLinePlaceholder":3497},[3186,6669,6670],{"class":3188,"line":3436},[3186,6671,6672],{"class":3192},"    // Наївна реалізація — race condition!\n",[3186,6674,6675,6677,6679,6681,6683,6686,6688,6691],{"class":3188,"line":3488},[3186,6676,5397],{"class":3199},[3186,6678,3400],{"class":3199},[3186,6680,3404],{"class":3403},[3186,6682,4663],{"class":3206},[3186,6684,6685],{"class":3403},"Booking",[3186,6687,4669],{"class":3206},[3186,6689,6690],{"class":3407},"BookRoomNaiveAsync",[3186,6692,4855],{"class":3206},[3186,6694,6695,6698,6701,6703,6706,6709,6711,6713,6716,6718,6720,6723],{"class":3188,"line":3494},[3186,6696,6697],{"class":3199},"        int",[3186,6699,6700],{"class":3417}," roomId",[3186,6702,3963],{"class":3206},[3186,6704,6705],{"class":3403},"DateOnly",[3186,6707,6708],{"class":3417}," checkIn",[3186,6710,3963],{"class":3206},[3186,6712,6705],{"class":3403},[3186,6714,6715],{"class":3417}," checkOut",[3186,6717,3963],{"class":3206},[3186,6719,3957],{"class":3199},[3186,6721,6722],{"class":3417}," guestId",[3186,6724,3421],{"class":3206},[3186,6726,6727],{"class":3188,"line":3501},[3186,6728,3719],{"class":3206},[3186,6730,6731],{"class":3188,"line":3516},[3186,6732,6733],{"class":3192},"        // ❌ Check-Then-Act: між AnyAsync і Add → конфлікт!\n",[3186,6735,6736,6738,6741,6744,6746,6748,6750,6753,6755,6757,6759,6762],{"class":3188,"line":3536},[3186,6737,4158],{"class":3199},[3186,6739,6740],{"class":3417}," isAvailable",[3186,6742,6743],{"class":3206}," = !",[3186,6745,3448],{"class":3199},[3186,6747,6661],{"class":3417},[3186,6749,3080],{"class":3206},[3186,6751,6752],{"class":3417},"Bookings",[3186,6754,3080],{"class":3206},[3186,6756,3461],{"class":3407},[3186,6758,3411],{"class":3206},[3186,6760,6761],{"class":3417},"b",[3186,6763,6764],{"class":3206}," =>\n",[3186,6766,6767,6770,6772,6775,6778,6781],{"class":3188,"line":3541},[3186,6768,6769],{"class":3417},"            b",[3186,6771,3080],{"class":3206},[3186,6773,6774],{"class":3417},"RoomId",[3186,6776,6777],{"class":3206},"      == ",[3186,6779,6780],{"class":3417},"roomId",[3186,6782,3855],{"class":3206},[3186,6784,6785,6787,6789,6792,6795,6798],{"class":3188,"line":3547},[3186,6786,6769],{"class":3417},[3186,6788,3080],{"class":3206},[3186,6790,6791],{"class":3417},"CheckIn",[3186,6793,6794],{"class":3206},"     \u003C ",[3186,6796,6797],{"class":3417},"checkOut",[3186,6799,3855],{"class":3206},[3186,6801,6802,6804,6806,6809,6812,6815],{"class":3188,"line":3582},[3186,6803,6769],{"class":3417},[3186,6805,3080],{"class":3206},[3186,6807,6808],{"class":3417},"CheckOut",[3186,6810,6811],{"class":3206},"    > ",[3186,6813,6814],{"class":3417},"checkIn",[3186,6816,3855],{"class":3206},[3186,6818,6819,6821,6823,6826,6829,6832],{"class":3188,"line":3601},[3186,6820,6769],{"class":3417},[3186,6822,3080],{"class":3206},[3186,6824,6825],{"class":3417},"Status",[3186,6827,6828],{"class":3206},"      != ",[3186,6830,6831],{"class":3530},"\"Cancelled\"",[3186,6833,3485],{"class":3206},[3186,6835,6836],{"class":3188,"line":3790},[3186,6837,3498],{"emptyLinePlaceholder":3497},[3186,6839,6840,6842,6844,6847,6849,6851,6853,6856],{"class":3188,"line":3795},[3186,6841,4189],{"class":3504},[3186,6843,6011],{"class":3206},[3186,6845,6846],{"class":3417},"isAvailable",[3186,6848,3753],{"class":3206},[3186,6850,4566],{"class":3504},[3186,6852,3522],{"class":3199},[3186,6854,6855],{"class":3403}," RoomNotAvailableException",[3186,6857,3651],{"class":3206},[3186,6859,6860],{"class":3188,"line":3800},[3186,6861,3498],{"emptyLinePlaceholder":3497},[3186,6863,6864,6866,6869,6871,6873],{"class":3188,"line":3805},[3186,6865,4158],{"class":3199},[3186,6867,6868],{"class":3417}," booking",[3186,6870,3445],{"class":3206},[3186,6872,3564],{"class":3199},[3186,6874,6875],{"class":3403}," Booking\n",[3186,6877,6878],{"class":3188,"line":3828},[3186,6879,4247],{"class":3206},[3186,6881,6882,6885,6887,6889],{"class":3188,"line":3833},[3186,6883,6884],{"class":3417},"            RoomId",[3186,6886,5888],{"class":3206},[3186,6888,6780],{"class":3417},[3186,6890,4865],{"class":3206},[3186,6892,6893,6896,6899,6902],{"class":3188,"line":3858},[3186,6894,6895],{"class":3417},"            GuestId",[3186,6897,6898],{"class":3206},"   = ",[3186,6900,6901],{"class":3417},"guestId",[3186,6903,4865],{"class":3206},[3186,6905,6906,6909,6911,6913],{"class":3188,"line":3898},[3186,6907,6908],{"class":3417},"            CheckIn",[3186,6910,6898],{"class":3206},[3186,6912,6814],{"class":3417},[3186,6914,4865],{"class":3206},[3186,6916,6917,6920,6922,6924],{"class":3188,"line":3904},[3186,6918,6919],{"class":3417},"            CheckOut",[3186,6921,5904],{"class":3206},[3186,6923,6797],{"class":3417},[3186,6925,4865],{"class":3206},[3186,6927,6928,6931,6933],{"class":3188,"line":4330},[3186,6929,6930],{"class":3417},"            Status",[3186,6932,5888],{"class":3206},[3186,6934,6935],{"class":3530},"\"Confirmed\"\n",[3186,6937,6938],{"class":3188,"line":4335},[3186,6939,6940],{"class":3206},"        };\n",[3186,6942,6943,6946,6948,6950,6952,6954,6956,6959],{"class":3188,"line":5151},[3186,6944,6945],{"class":3417},"        _context",[3186,6947,3080],{"class":3206},[3186,6949,6752],{"class":3417},[3186,6951,3080],{"class":3206},[3186,6953,3559],{"class":3407},[3186,6955,3411],{"class":3206},[3186,6957,6958],{"class":3417},"booking",[3186,6960,3485],{"class":3206},[3186,6962,6963,6965,6967,6969,6971],{"class":3188,"line":5156},[3186,6964,3724],{"class":3199},[3186,6966,6661],{"class":3417},[3186,6968,3080],{"class":3206},[3186,6970,3592],{"class":3407},[3186,6972,3651],{"class":3206},[3186,6974,6975,6977,6979],{"class":3188,"line":5162},[3186,6976,5027],{"class":3504},[3186,6978,6868],{"class":3417},[3186,6980,3219],{"class":3206},[3186,6982,6983],{"class":3188,"line":5183},[3186,6984,3737],{"class":3206},[3186,6986,6987],{"class":3188,"line":5188},[3186,6988,3498],{"emptyLinePlaceholder":3497},[3186,6990,6991],{"class":3188,"line":5201},[3186,6992,6993],{"class":3192},"    // ✅ Правильна реалізація: Unique Constraint + Exception handling\n",[3186,6995,6996,6998,7000,7002,7004,7006,7008,7011],{"class":3188,"line":5217},[3186,6997,5397],{"class":3199},[3186,6999,3400],{"class":3199},[3186,7001,3404],{"class":3403},[3186,7003,4663],{"class":3206},[3186,7005,6685],{"class":3403},[3186,7007,4669],{"class":3206},[3186,7009,7010],{"class":3407},"BookRoomSafeAsync",[3186,7012,4855],{"class":3206},[3186,7014,7015,7017,7019,7021,7023,7025,7027,7029,7031,7033,7035,7037],{"class":3188,"line":5245},[3186,7016,6697],{"class":3199},[3186,7018,6700],{"class":3417},[3186,7020,3963],{"class":3206},[3186,7022,6705],{"class":3403},[3186,7024,6708],{"class":3417},[3186,7026,3963],{"class":3206},[3186,7028,6705],{"class":3403},[3186,7030,6715],{"class":3417},[3186,7032,3963],{"class":3206},[3186,7034,3957],{"class":3199},[3186,7036,6722],{"class":3417},[3186,7038,3421],{"class":3206},[3186,7040,7041],{"class":3188,"line":5251},[3186,7042,3719],{"class":3206},[3186,7044,7045],{"class":3188,"line":5264},[3186,7046,7047],{"class":3192},"        // Без попередньої перевірки — покладаємось на UNIQUE CONSTRAINT:\n",[3186,7049,7050],{"class":3188,"line":5269},[3186,7051,7052],{"class":3192},"        // ALTER TABLE Rooms ADD CONSTRAINT no_overlap\n",[3186,7054,7055],{"class":3188,"line":5283},[3186,7056,7057],{"class":3192},"        //   EXCLUDE USING gist (RoomId WITH =, daterange(CheckIn, CheckOut) WITH &&)\n",[3186,7059,7060],{"class":3188,"line":5288},[3186,7061,7062],{"class":3192},"        // (PostgreSQL: Exclusion Constraint для діапазонів)\n",[3186,7064,7065],{"class":3188,"line":5325},[3186,7066,7067],{"class":3192},"        // SQL Server: через тригер або CHECK CONSTRAINT + INDEX\n",[3186,7069,7071],{"class":3188,"line":7070},40,[3186,7072,3498],{"emptyLinePlaceholder":3497},[3186,7074,7076,7078,7080,7082,7084],{"class":3188,"line":7075},41,[3186,7077,4158],{"class":3199},[3186,7079,6868],{"class":3417},[3186,7081,3445],{"class":3206},[3186,7083,3564],{"class":3199},[3186,7085,6875],{"class":3403},[3186,7087,7089],{"class":3188,"line":7088},42,[3186,7090,4247],{"class":3206},[3186,7092,7094,7096,7098,7100],{"class":3188,"line":7093},43,[3186,7095,6884],{"class":3417},[3186,7097,5888],{"class":3206},[3186,7099,6780],{"class":3417},[3186,7101,4865],{"class":3206},[3186,7103,7105,7107,7109,7111],{"class":3188,"line":7104},44,[3186,7106,6895],{"class":3417},[3186,7108,6898],{"class":3206},[3186,7110,6901],{"class":3417},[3186,7112,4865],{"class":3206},[3186,7114,7116,7118,7120,7122],{"class":3188,"line":7115},45,[3186,7117,6908],{"class":3417},[3186,7119,6898],{"class":3206},[3186,7121,6814],{"class":3417},[3186,7123,4865],{"class":3206},[3186,7125,7127,7129,7131,7133],{"class":3188,"line":7126},46,[3186,7128,6919],{"class":3417},[3186,7130,5904],{"class":3206},[3186,7132,6797],{"class":3417},[3186,7134,4865],{"class":3206},[3186,7136,7138,7140,7142],{"class":3188,"line":7137},47,[3186,7139,6930],{"class":3417},[3186,7141,5888],{"class":3206},[3186,7143,6935],{"class":3530},[3186,7145,7147],{"class":3188,"line":7146},48,[3186,7148,6940],{"class":3206},[3186,7150,7152],{"class":3188,"line":7151},49,[3186,7153,3498],{"emptyLinePlaceholder":3497},[3186,7155,7157,7159,7161,7163,7165,7167,7169,7171],{"class":3188,"line":7156},50,[3186,7158,6945],{"class":3417},[3186,7160,3080],{"class":3206},[3186,7162,6752],{"class":3417},[3186,7164,3080],{"class":3206},[3186,7166,3559],{"class":3407},[3186,7168,3411],{"class":3206},[3186,7170,6958],{"class":3417},[3186,7172,3485],{"class":3206},[3186,7174,7176],{"class":3188,"line":7175},51,[3186,7177,3498],{"emptyLinePlaceholder":3497},[3186,7179,7181],{"class":3188,"line":7180},52,[3186,7182,4242],{"class":3504},[3186,7184,7186],{"class":3188,"line":7185},53,[3186,7187,4247],{"class":3206},[3186,7189,7191,7193,7195,7197,7199],{"class":3188,"line":7190},54,[3186,7192,4252],{"class":3199},[3186,7194,6661],{"class":3417},[3186,7196,3080],{"class":3206},[3186,7198,3592],{"class":3407},[3186,7200,3651],{"class":3206},[3186,7202,7204,7206,7208],{"class":3188,"line":7203},55,[3186,7205,4265],{"class":3504},[3186,7207,6868],{"class":3417},[3186,7209,3219],{"class":3206},[3186,7211,7213],{"class":3188,"line":7212},56,[3186,7214,4275],{"class":3206},[3186,7216,7218,7220,7222,7224,7226,7228,7230,7232,7235,7237,7239],{"class":3188,"line":7217},57,[3186,7219,4280],{"class":3504},[3186,7221,3508],{"class":3206},[3186,7223,3747],{"class":3403},[3186,7225,3750],{"class":3417},[3186,7227,3753],{"class":3206},[3186,7229,3756],{"class":3504},[3186,7231,3508],{"class":3206},[3186,7233,7234],{"class":3407},"IsOverlapConstraintViolation",[3186,7236,3411],{"class":3206},[3186,7238,3766],{"class":3417},[3186,7240,3769],{"class":3206},[3186,7242,7244],{"class":3188,"line":7243},58,[3186,7245,4247],{"class":3206},[3186,7247,7249,7251,7253,7255],{"class":3188,"line":7248},59,[3186,7250,4208],{"class":3504},[3186,7252,3522],{"class":3199},[3186,7254,6855],{"class":3403},[3186,7256,4855],{"class":3206},[3186,7258,7260,7263,7265,7267,7269,7272,7274,7276,7278,7281,7283,7286,7288,7290,7292,7294,7296,7298],{"class":3188,"line":7259},60,[3186,7261,7262],{"class":3530},"                $\"Room ",[3186,7264,4590],{"class":4589},[3186,7266,6780],{"class":3417},[3186,7268,4599],{"class":4589},[3186,7270,7271],{"class":3530}," is already booked for ",[3186,7273,4590],{"class":4589},[3186,7275,6814],{"class":3417},[3186,7277,4099],{"class":3206},[3186,7279,7280],{"class":3417},"d",[3186,7282,4599],{"class":4589},[3186,7284,7285],{"class":3530},"–",[3186,7287,4590],{"class":4589},[3186,7289,6797],{"class":3417},[3186,7291,4099],{"class":3206},[3186,7293,7280],{"class":3417},[3186,7295,4599],{"class":4589},[3186,7297,4602],{"class":3530},[3186,7299,3485],{"class":3206},[3186,7301,7303],{"class":3188,"line":7302},61,[3186,7304,4275],{"class":3206},[3186,7306,7308],{"class":3188,"line":7307},62,[3186,7309,3737],{"class":3206},[3186,7311,7313],{"class":3188,"line":7312},63,[3186,7314,3498],{"emptyLinePlaceholder":3497},[3186,7316,7318],{"class":3188,"line":7317},64,[3186,7319,7320],{"class":3192},"    // Альтернатива: Pessimistic Lock для room\n",[3186,7322,7324,7326,7328,7330,7332,7334,7336,7339],{"class":3188,"line":7323},65,[3186,7325,5397],{"class":3199},[3186,7327,3400],{"class":3199},[3186,7329,3404],{"class":3403},[3186,7331,4663],{"class":3206},[3186,7333,6685],{"class":3403},[3186,7335,4669],{"class":3206},[3186,7337,7338],{"class":3407},"BookRoomWithLockAsync",[3186,7340,4855],{"class":3206},[3186,7342,7344,7346,7348,7350,7352,7354,7356,7358,7360,7362,7364,7366],{"class":3188,"line":7343},66,[3186,7345,6697],{"class":3199},[3186,7347,6700],{"class":3417},[3186,7349,3963],{"class":3206},[3186,7351,6705],{"class":3403},[3186,7353,6708],{"class":3417},[3186,7355,3963],{"class":3206},[3186,7357,6705],{"class":3403},[3186,7359,6715],{"class":3417},[3186,7361,3963],{"class":3206},[3186,7363,3957],{"class":3199},[3186,7365,6722],{"class":3417},[3186,7367,3421],{"class":3206},[3186,7369,7371],{"class":3188,"line":7370},67,[3186,7372,3719],{"class":3206},[3186,7374,7376,7378,7380,7382,7384,7386,7388,7390,7392,7394,7396,7398],{"class":3188,"line":7375},68,[3186,7377,3724],{"class":3199},[3186,7379,5075],{"class":3504},[3186,7381,5078],{"class":3199},[3186,7383,5081],{"class":3417},[3186,7385,3445],{"class":3206},[3186,7387,3448],{"class":3199},[3186,7389,6661],{"class":3417},[3186,7391,3080],{"class":3206},[3186,7393,5092],{"class":3417},[3186,7395,3080],{"class":3206},[3186,7397,5097],{"class":3407},[3186,7399,4855],{"class":3206},[3186,7401,7403,7406,7408,7410],{"class":3188,"line":7402},69,[3186,7404,7405],{"class":3417},"            IsolationLevel",[3186,7407,3080],{"class":3206},[3186,7409,3071],{"class":3417},[3186,7411,3485],{"class":3206},[3186,7413,7415],{"class":3188,"line":7414},70,[3186,7416,3498],{"emptyLinePlaceholder":3497},[3186,7418,7420],{"class":3188,"line":7419},71,[3186,7421,7422],{"class":3192},"        // Блокуємо Room на рівні рядка\n",[3186,7424,7426,7428,7431,7433,7435,7437,7439],{"class":3188,"line":7425},72,[3186,7427,4158],{"class":3199},[3186,7429,7430],{"class":3417}," room",[3186,7432,3445],{"class":3206},[3186,7434,3448],{"class":3199},[3186,7436,6661],{"class":3417},[3186,7438,3080],{"class":3206},[3186,7440,7441],{"class":3417},"Rooms\n",[3186,7443,7445,7448,7451,7453,7456,7458,7460],{"class":3188,"line":7444},73,[3186,7446,7447],{"class":3206},"            .",[3186,7449,7450],{"class":3407},"FromSqlRaw",[3186,7452,3411],{"class":3206},[3186,7454,7455],{"class":3530},"\"SELECT * FROM Rooms WITH (UPDLOCK, ROWLOCK) WHERE Id = {0}\"",[3186,7457,3963],{"class":3206},[3186,7459,6780],{"class":3417},[3186,7461,3421],{"class":3206},[3186,7463,7465,7467,7469],{"class":3188,"line":7464},74,[3186,7466,7447],{"class":3206},[3186,7468,4938],{"class":3407},[3186,7470,3651],{"class":3206},[3186,7472,7474],{"class":3188,"line":7473},75,[3186,7475,3498],{"emptyLinePlaceholder":3497},[3186,7477,7479,7481,7483,7486,7488,7490,7492,7494,7496,7498],{"class":3188,"line":7478},76,[3186,7480,4189],{"class":3504},[3186,7482,3508],{"class":3206},[3186,7484,7485],{"class":3417},"room",[3186,7487,3846],{"class":3199},[3186,7489,4561],{"class":3199},[3186,7491,3753],{"class":3206},[3186,7493,4566],{"class":3504},[3186,7495,3522],{"class":3199},[3186,7497,4571],{"class":3403},[3186,7499,3651],{"class":3206},[3186,7501,7503],{"class":3188,"line":7502},77,[3186,7504,3498],{"emptyLinePlaceholder":3497},[3186,7506,7508],{"class":3188,"line":7507},78,[3186,7509,7510],{"class":3192},"        // Тепер можна перевіряти без race condition (інші чекають блокування)\n",[3186,7512,7514,7516,7518,7520,7522,7524,7526,7528,7530,7532,7534,7536],{"class":3188,"line":7513},79,[3186,7515,4158],{"class":3199},[3186,7517,6740],{"class":3417},[3186,7519,6743],{"class":3206},[3186,7521,3448],{"class":3199},[3186,7523,6661],{"class":3417},[3186,7525,3080],{"class":3206},[3186,7527,6752],{"class":3417},[3186,7529,3080],{"class":3206},[3186,7531,3461],{"class":3407},[3186,7533,3411],{"class":3206},[3186,7535,6761],{"class":3417},[3186,7537,6764],{"class":3206},[3186,7539,7541,7543,7545,7547,7550,7552],{"class":3188,"line":7540},80,[3186,7542,6769],{"class":3417},[3186,7544,3080],{"class":3206},[3186,7546,6774],{"class":3417},[3186,7548,7549],{"class":3206},"  == ",[3186,7551,6780],{"class":3417},[3186,7553,3855],{"class":3206},[3186,7555,7557,7559,7561,7563,7566,7568],{"class":3188,"line":7556},81,[3186,7558,6769],{"class":3417},[3186,7560,3080],{"class":3206},[3186,7562,6791],{"class":3417},[3186,7564,7565],{"class":3206},"  \u003C ",[3186,7567,6797],{"class":3417},[3186,7569,3855],{"class":3206},[3186,7571,7573,7575,7577,7579,7582,7584],{"class":3188,"line":7572},82,[3186,7574,6769],{"class":3417},[3186,7576,3080],{"class":3206},[3186,7578,6808],{"class":3417},[3186,7580,7581],{"class":3206}," > ",[3186,7583,6814],{"class":3417},[3186,7585,3855],{"class":3206},[3186,7587,7589,7591,7593,7595,7598,7600],{"class":3188,"line":7588},83,[3186,7590,6769],{"class":3417},[3186,7592,3080],{"class":3206},[3186,7594,6825],{"class":3417},[3186,7596,7597],{"class":3206},"  != ",[3186,7599,6831],{"class":3530},[3186,7601,3485],{"class":3206},[3186,7603,7605],{"class":3188,"line":7604},84,[3186,7606,3498],{"emptyLinePlaceholder":3497},[3186,7608,7610,7612,7614,7616],{"class":3188,"line":7609},85,[3186,7611,4189],{"class":3504},[3186,7613,6011],{"class":3206},[3186,7615,6846],{"class":3417},[3186,7617,3421],{"class":3206},[3186,7619,7621],{"class":3188,"line":7620},86,[3186,7622,4247],{"class":3206},[3186,7624,7626,7628,7630,7632,7635],{"class":3188,"line":7625},87,[3186,7627,4252],{"class":3199},[3186,7629,5081],{"class":3417},[3186,7631,3080],{"class":3206},[3186,7633,7634],{"class":3407},"RollbackAsync",[3186,7636,3651],{"class":3206},[3186,7638,7640,7642,7644,7646],{"class":3188,"line":7639},88,[3186,7641,4208],{"class":3504},[3186,7643,3522],{"class":3199},[3186,7645,6855],{"class":3403},[3186,7647,3651],{"class":3206},[3186,7649,7651],{"class":3188,"line":7650},89,[3186,7652,4275],{"class":3206},[3186,7654,7656],{"class":3188,"line":7655},90,[3186,7657,3498],{"emptyLinePlaceholder":3497},[3186,7659,7661,7663,7665,7667,7669,7672,7674,7676,7678,7680,7682,7685,7687,7689],{"class":3188,"line":7660},91,[3186,7662,4158],{"class":3199},[3186,7664,6868],{"class":3417},[3186,7666,3445],{"class":3206},[3186,7668,3564],{"class":3199},[3186,7670,7671],{"class":3403}," Booking",[3186,7673,3570],{"class":3206},[3186,7675,6774],{"class":3417},[3186,7677,3445],{"class":3206},[3186,7679,6780],{"class":3417},[3186,7681,3963],{"class":3206},[3186,7683,7684],{"class":3417},"GuestId",[3186,7686,3445],{"class":3206},[3186,7688,6901],{"class":3417},[3186,7690,4865],{"class":3206},[3186,7692,7694,7697,7699,7701,7703,7705,7707,7709],{"class":3188,"line":7693},92,[3186,7695,7696],{"class":3417},"                                     CheckIn",[3186,7698,3445],{"class":3206},[3186,7700,6814],{"class":3417},[3186,7702,3963],{"class":3206},[3186,7704,6808],{"class":3417},[3186,7706,3445],{"class":3206},[3186,7708,6797],{"class":3417},[3186,7710,7711],{"class":3206}," };\n",[3186,7713,7715,7717,7719,7721,7723,7725,7727,7729],{"class":3188,"line":7714},93,[3186,7716,6945],{"class":3417},[3186,7718,3080],{"class":3206},[3186,7720,6752],{"class":3417},[3186,7722,3080],{"class":3206},[3186,7724,3559],{"class":3407},[3186,7726,3411],{"class":3206},[3186,7728,6958],{"class":3417},[3186,7730,3485],{"class":3206},[3186,7732,7734,7736,7738,7740,7742],{"class":3188,"line":7733},94,[3186,7735,3724],{"class":3199},[3186,7737,6661],{"class":3417},[3186,7739,3080],{"class":3206},[3186,7741,3592],{"class":3407},[3186,7743,3651],{"class":3206},[3186,7745,7747,7749,7751,7753,7755],{"class":3188,"line":7746},95,[3186,7748,3724],{"class":3199},[3186,7750,5081],{"class":3417},[3186,7752,3080],{"class":3206},[3186,7754,5278],{"class":3407},[3186,7756,3651],{"class":3206},[3186,7758,7760,7762,7764],{"class":3188,"line":7759},96,[3186,7761,5027],{"class":3504},[3186,7763,6868],{"class":3417},[3186,7765,3219],{"class":3206},[3186,7767,7769],{"class":3188,"line":7768},97,[3186,7770,3737],{"class":3206},[3186,7772,7774],{"class":3188,"line":7773},98,[3186,7775,3498],{"emptyLinePlaceholder":3497},[3186,7777,7779,7781,7783,7785,7788,7790,7792,7794],{"class":3188,"line":7778},99,[3186,7780,6652],{"class":3199},[3186,7782,3811],{"class":3199},[3186,7784,3814],{"class":3199},[3186,7786,7787],{"class":3407}," IsOverlapConstraintViolation",[3186,7789,3411],{"class":3206},[3186,7791,3747],{"class":3403},[3186,7793,3750],{"class":3417},[3186,7795,3421],{"class":3206},[3186,7797,7799,7801,7803,7805,7807,7810,7813,7815,7818,7820,7823,7826,7828],{"class":3188,"line":7798},100,[3186,7800,5423],{"class":3206},[3186,7802,3766],{"class":3417},[3186,7804,3080],{"class":3206},[3186,7806,3843],{"class":3417},[3186,7808,7809],{"class":3206},"?.",[3186,7811,7812],{"class":3417},"Message",[3186,7814,3080],{"class":3206},[3186,7816,7817],{"class":3407},"Contains",[3186,7819,3411],{"class":3206},[3186,7821,7822],{"class":3530},"\"no_overlap\"",[3186,7824,7825],{"class":3206},") == ",[3186,7827,4147],{"class":3199},[3186,7829,7830],{"class":3206}," ||\n",[3186,7832,7834,7837,7839,7841,7843,7845,7847,7849,7851,7854,7856,7858],{"class":3188,"line":7833},101,[3186,7835,7836],{"class":3417},"           ex",[3186,7838,3080],{"class":3206},[3186,7840,3843],{"class":3417},[3186,7842,7809],{"class":3206},[3186,7844,7812],{"class":3417},[3186,7846,3080],{"class":3206},[3186,7848,7817],{"class":3407},[3186,7850,3411],{"class":3206},[3186,7852,7853],{"class":3530},"\"IX_Bookings\"",[3186,7855,7825],{"class":3206},[3186,7857,4147],{"class":3199},[3186,7859,3219],{"class":3206},[3186,7861,7863],{"class":3188,"line":7862},102,[3186,7864,3604],{"class":3206},[3003,7866,7868],{"id":7867},"сценарій-2-інвентаризація-preventing-oversell","Сценарій 2: Інвентаризація — Preventing Oversell",[2965,7870,7871],{},"E-commerce: захист від продажу більше ніж є на складі:",[3017,7873,7875],{"className":3383,"code":7874,"language":3385,"meta":3025,"style":3025},"public class InventoryService\n{\n    private readonly AppDbContext _context;\n\n    // ✅ Атомарний UPDATE з перевіркою залишку\n    public async Task\u003CReservationResult> ReserveItemsAsync(\n        IReadOnlyList\u003C(int ProductId, int Quantity)> items)\n    {\n        var reservations = new List\u003CStockReservation>();\n        var failures     = new List\u003C(int ProductId, int Available, int Requested)>();\n\n        using var tx = await _context.Database.BeginTransactionAsync();\n\n        foreach (var (productId, quantity) in items)\n        {\n            // Атомарний: зменшити якщо Stock достатній\n            var rowsAffected = await _context.Products\n                .Where(p => p.Id == productId && p.Stock >= quantity)\n                .ExecuteUpdateAsync(s =>\n                    s.SetProperty(p => p.Stock, p => p.Stock - quantity));\n\n            if (rowsAffected == 1)\n            {\n                reservations.Add(new StockReservation\n                {\n                    ProductId      = productId,\n                    ReservedQty    = quantity,\n                    ReservedAt     = DateTime.UtcNow,\n                    ExpiresAt      = DateTime.UtcNow.AddMinutes(30)\n                });\n            }\n            else\n            {\n                // Знайти реальний залишок для повідомлення про помилку\n                var available = await _context.Products\n                    .Where(p => p.Id == productId)\n                    .Select(p => p.Stock)\n                    .FirstOrDefaultAsync();\n\n                failures.Add((productId, available, quantity));\n            }\n        }\n\n        if (failures.Count > 0)\n        {\n            // Якщо хоч один товар недоступний → відкотити всі резервування\n            await tx.RollbackAsync();\n\n            return ReservationResult.Failed(failures.Select(f =>\n                $\"Product {f.ProductId}: requested {f.Requested}, available {f.Available}\"));\n        }\n\n        // Зберегти резервування\n        _context.StockReservations.AddRange(reservations);\n        await _context.SaveChangesAsync();\n        await tx.CommitAsync();\n\n        return ReservationResult.Success(reservations);\n    }\n\n    // Звільнення резервування (при скасуванні або закінченні часу)\n    public async Task ReleaseReservationAsync(Guid reservationId)\n    {\n        using var tx = await _context.Database.BeginTransactionAsync();\n\n        var reservation = await _context.StockReservations\n            .FirstOrDefaultAsync(r => r.Id == reservationId &&\n                                      r.Status == \"Active\");\n\n        if (reservation is null)\n        {\n            await tx.RollbackAsync();\n            return;\n        }\n\n        // Повернути товар на склад\n        await _context.Products\n            .Where(p => p.Id == reservation.ProductId)\n            .ExecuteUpdateAsync(s =>\n                s.SetProperty(p => p.Stock, p => p.Stock + reservation.ReservedQty));\n\n        reservation.Status = \"Released\";\n        reservation.ReleasedAt = DateTime.UtcNow;\n        await _context.SaveChangesAsync();\n\n        await tx.CommitAsync();\n    }\n}\n",[2969,7876,7877,7886,7890,7902,7906,7911,7931,7959,7963,7985,8022,8026,8051,8055,8083,8087,8092,8109,8146,8158,8197,8201,8217,8222,8238,8243,8254,8265,8280,8305,8310,8315,8320,8324,8329,8347,8372,8393,8401,8405,8430,8434,8438,8442,8462,8466,8471,8483,8487,8514,8562,8566,8570,8575,8596,8608,8620,8624,8641,8645,8649,8654,8674,8678,8702,8706,8724,8750,8766,8770,8785,8789,8801,8807,8811,8815,8820,8830,8858,8870,8915,8919,8935,8954,8966,8970,8982,8986],{"__ignoreMap":3025},[3186,7878,7879,7881,7883],{"class":3188,"line":3189},[3186,7880,3397],{"class":3199},[3186,7882,5380],{"class":3199},[3186,7884,7885],{"class":3403}," InventoryService\n",[3186,7887,7888],{"class":3188,"line":3196},[3186,7889,3427],{"class":3206},[3186,7891,7892,7894,7896,7898,7900],{"class":3188,"line":3424},[3186,7893,6652],{"class":3199},[3186,7895,6655],{"class":3199},[3186,7897,6658],{"class":3403},[3186,7899,6661],{"class":3417},[3186,7901,3219],{"class":3206},[3186,7903,7904],{"class":3188,"line":3430},[3186,7905,3498],{"emptyLinePlaceholder":3497},[3186,7907,7908],{"class":3188,"line":3436},[3186,7909,7910],{"class":3192},"    // ✅ Атомарний UPDATE з перевіркою залишку\n",[3186,7912,7913,7915,7917,7919,7921,7924,7926,7929],{"class":3188,"line":3488},[3186,7914,5397],{"class":3199},[3186,7916,3400],{"class":3199},[3186,7918,3404],{"class":3403},[3186,7920,4663],{"class":3206},[3186,7922,7923],{"class":3403},"ReservationResult",[3186,7925,4669],{"class":3206},[3186,7927,7928],{"class":3407},"ReserveItemsAsync",[3186,7930,4855],{"class":3206},[3186,7932,7933,7936,7939,7941,7944,7946,7948,7951,7954,7957],{"class":3188,"line":3494},[3186,7934,7935],{"class":3403},"        IReadOnlyList",[3186,7937,7938],{"class":3206},"\u003C(",[3186,7940,3957],{"class":3199},[3186,7942,7943],{"class":3417}," ProductId",[3186,7945,3963],{"class":3206},[3186,7947,3957],{"class":3199},[3186,7949,7950],{"class":3417}," Quantity",[3186,7952,7953],{"class":3206},")> ",[3186,7955,7956],{"class":3417},"items",[3186,7958,3421],{"class":3206},[3186,7960,7961],{"class":3188,"line":3501},[3186,7962,3719],{"class":3206},[3186,7964,7965,7967,7970,7972,7974,7977,7979,7982],{"class":3188,"line":3516},[3186,7966,4158],{"class":3199},[3186,7968,7969],{"class":3417}," reservations",[3186,7971,3445],{"class":3206},[3186,7973,3564],{"class":3199},[3186,7975,7976],{"class":3403}," List",[3186,7978,4663],{"class":3206},[3186,7980,7981],{"class":3403},"StockReservation",[3186,7983,7984],{"class":3206},">();\n",[3186,7986,7987,7989,7992,7995,7997,7999,8001,8003,8005,8007,8009,8012,8014,8016,8019],{"class":3188,"line":3536},[3186,7988,4158],{"class":3199},[3186,7990,7991],{"class":3417}," failures",[3186,7993,7994],{"class":3206},"     = ",[3186,7996,3564],{"class":3199},[3186,7998,7976],{"class":3403},[3186,8000,7938],{"class":3206},[3186,8002,3957],{"class":3199},[3186,8004,7943],{"class":3417},[3186,8006,3963],{"class":3206},[3186,8008,3957],{"class":3199},[3186,8010,8011],{"class":3417}," Available",[3186,8013,3963],{"class":3206},[3186,8015,3957],{"class":3199},[3186,8017,8018],{"class":3417}," Requested",[3186,8020,8021],{"class":3206},")>();\n",[3186,8023,8024],{"class":3188,"line":3541},[3186,8025,3498],{"emptyLinePlaceholder":3497},[3186,8027,8028,8031,8033,8035,8037,8039,8041,8043,8045,8047,8049],{"class":3188,"line":3547},[3186,8029,8030],{"class":3504},"        using",[3186,8032,5078],{"class":3199},[3186,8034,5081],{"class":3417},[3186,8036,3445],{"class":3206},[3186,8038,3448],{"class":3199},[3186,8040,6661],{"class":3417},[3186,8042,3080],{"class":3206},[3186,8044,5092],{"class":3417},[3186,8046,3080],{"class":3206},[3186,8048,5097],{"class":3407},[3186,8050,3651],{"class":3206},[3186,8052,8053],{"class":3188,"line":3582},[3186,8054,3498],{"emptyLinePlaceholder":3497},[3186,8056,8057,8060,8062,8065,8067,8069,8071,8073,8075,8078,8081],{"class":3188,"line":3601},[3186,8058,8059],{"class":3504},"        foreach",[3186,8061,3508],{"class":3206},[3186,8063,8064],{"class":3199},"var",[3186,8066,3508],{"class":3206},[3186,8068,4003],{"class":3417},[3186,8070,3963],{"class":3206},[3186,8072,4035],{"class":3417},[3186,8074,3753],{"class":3206},[3186,8076,8077],{"class":3504},"in",[3186,8079,8080],{"class":3417}," items",[3186,8082,3421],{"class":3206},[3186,8084,8085],{"class":3188,"line":3790},[3186,8086,4247],{"class":3206},[3186,8088,8089],{"class":3188,"line":3795},[3186,8090,8091],{"class":3192},"            // Атомарний: зменшити якщо Stock достатній\n",[3186,8093,8094,8097,8099,8101,8103,8105,8107],{"class":3188,"line":3800},[3186,8095,8096],{"class":3199},"            var",[3186,8098,4388],{"class":3417},[3186,8100,3445],{"class":3206},[3186,8102,3448],{"class":3199},[3186,8104,6661],{"class":3417},[3186,8106,3080],{"class":3206},[3186,8108,4399],{"class":3417},[3186,8110,8111,8114,8116,8118,8120,8122,8124,8126,8128,8130,8132,8134,8136,8138,8140,8142,8144],{"class":3188,"line":3805},[3186,8112,8113],{"class":3206},"                .",[3186,8115,4407],{"class":3407},[3186,8117,3411],{"class":3206},[3186,8119,2965],{"class":3417},[3186,8121,3469],{"class":3206},[3186,8123,2965],{"class":3417},[3186,8125,3080],{"class":3206},[3186,8127,4420],{"class":3417},[3186,8129,3479],{"class":3206},[3186,8131,4003],{"class":3417},[3186,8133,4427],{"class":3206},[3186,8135,2965],{"class":3417},[3186,8137,3080],{"class":3206},[3186,8139,4029],{"class":3417},[3186,8141,4436],{"class":3206},[3186,8143,4035],{"class":3417},[3186,8145,3421],{"class":3206},[3186,8147,8148,8150,8152,8154,8156],{"class":3188,"line":3828},[3186,8149,8113],{"class":3206},[3186,8151,4447],{"class":3407},[3186,8153,3411],{"class":3206},[3186,8155,4452],{"class":3417},[3186,8157,6764],{"class":3206},[3186,8159,8160,8163,8165,8167,8169,8171,8173,8175,8177,8179,8181,8183,8185,8187,8189,8191,8193,8195],{"class":3188,"line":3833},[3186,8161,8162],{"class":3417},"                    s",[3186,8164,3080],{"class":3206},[3186,8166,4461],{"class":3407},[3186,8168,3411],{"class":3206},[3186,8170,2965],{"class":3417},[3186,8172,3469],{"class":3206},[3186,8174,2965],{"class":3417},[3186,8176,3080],{"class":3206},[3186,8178,4029],{"class":3417},[3186,8180,3963],{"class":3206},[3186,8182,2965],{"class":3417},[3186,8184,3469],{"class":3206},[3186,8186,2965],{"class":3417},[3186,8188,3080],{"class":3206},[3186,8190,4029],{"class":3417},[3186,8192,4488],{"class":3206},[3186,8194,4035],{"class":3417},[3186,8196,4493],{"class":3206},[3186,8198,8199],{"class":3188,"line":3858},[3186,8200,3498],{"emptyLinePlaceholder":3497},[3186,8202,8203,8206,8208,8210,8212,8215],{"class":3188,"line":3898},[3186,8204,8205],{"class":3504},"            if",[3186,8207,3508],{"class":3206},[3186,8209,4506],{"class":3417},[3186,8211,3479],{"class":3206},[3186,8213,8214],{"class":3874},"1",[3186,8216,3421],{"class":3206},[3186,8218,8219],{"class":3188,"line":3904},[3186,8220,8221],{"class":3206},"            {\n",[3186,8223,8224,8227,8229,8231,8233,8235],{"class":3188,"line":4330},[3186,8225,8226],{"class":3417},"                reservations",[3186,8228,3080],{"class":3206},[3186,8230,3559],{"class":3407},[3186,8232,3411],{"class":3206},[3186,8234,3564],{"class":3199},[3186,8236,8237],{"class":3403}," StockReservation\n",[3186,8239,8240],{"class":3188,"line":4335},[3186,8241,8242],{"class":3206},"                {\n",[3186,8244,8245,8248,8250,8252],{"class":3188,"line":5151},[3186,8246,8247],{"class":3417},"                    ProductId",[3186,8249,5194],{"class":3206},[3186,8251,4003],{"class":3417},[3186,8253,4865],{"class":3206},[3186,8255,8256,8259,8261,8263],{"class":3188,"line":5156},[3186,8257,8258],{"class":3417},"                    ReservedQty",[3186,8260,5888],{"class":3206},[3186,8262,4035],{"class":3417},[3186,8264,4865],{"class":3206},[3186,8266,8267,8270,8272,8274,8276,8278],{"class":3188,"line":5162},[3186,8268,8269],{"class":3417},"                    ReservedAt",[3186,8271,7994],{"class":3206},[3186,8273,5225],{"class":3417},[3186,8275,3080],{"class":3206},[3186,8277,5230],{"class":3417},[3186,8279,4865],{"class":3206},[3186,8281,8282,8285,8287,8289,8291,8293,8295,8298,8300,8303],{"class":3188,"line":5183},[3186,8283,8284],{"class":3417},"                    ExpiresAt",[3186,8286,5194],{"class":3206},[3186,8288,5225],{"class":3417},[3186,8290,3080],{"class":3206},[3186,8292,5230],{"class":3417},[3186,8294,3080],{"class":3206},[3186,8296,8297],{"class":3407},"AddMinutes",[3186,8299,3411],{"class":3206},[3186,8301,8302],{"class":3874},"30",[3186,8304,3421],{"class":3206},[3186,8306,8307],{"class":3188,"line":5188},[3186,8308,8309],{"class":3206},"                });\n",[3186,8311,8312],{"class":3188,"line":5201},[3186,8313,8314],{"class":3206},"            }\n",[3186,8316,8317],{"class":3188,"line":5217},[3186,8318,8319],{"class":3504},"            else\n",[3186,8321,8322],{"class":3188,"line":5245},[3186,8323,8221],{"class":3206},[3186,8325,8326],{"class":3188,"line":5251},[3186,8327,8328],{"class":3192},"                // Знайти реальний залишок для повідомлення про помилку\n",[3186,8330,8331,8334,8337,8339,8341,8343,8345],{"class":3188,"line":5264},[3186,8332,8333],{"class":3199},"                var",[3186,8335,8336],{"class":3417}," available",[3186,8338,3445],{"class":3206},[3186,8340,3448],{"class":3199},[3186,8342,6661],{"class":3417},[3186,8344,3080],{"class":3206},[3186,8346,4399],{"class":3417},[3186,8348,8349,8352,8354,8356,8358,8360,8362,8364,8366,8368,8370],{"class":3188,"line":5269},[3186,8350,8351],{"class":3206},"                    .",[3186,8353,4407],{"class":3407},[3186,8355,3411],{"class":3206},[3186,8357,2965],{"class":3417},[3186,8359,3469],{"class":3206},[3186,8361,2965],{"class":3417},[3186,8363,3080],{"class":3206},[3186,8365,4420],{"class":3417},[3186,8367,3479],{"class":3206},[3186,8369,4003],{"class":3417},[3186,8371,3421],{"class":3206},[3186,8373,8374,8376,8379,8381,8383,8385,8387,8389,8391],{"class":3188,"line":5283},[3186,8375,8351],{"class":3206},[3186,8377,8378],{"class":3407},"Select",[3186,8380,3411],{"class":3206},[3186,8382,2965],{"class":3417},[3186,8384,3469],{"class":3206},[3186,8386,2965],{"class":3417},[3186,8388,3080],{"class":3206},[3186,8390,4029],{"class":3417},[3186,8392,3421],{"class":3206},[3186,8394,8395,8397,8399],{"class":3188,"line":5288},[3186,8396,8351],{"class":3206},[3186,8398,4938],{"class":3407},[3186,8400,3651],{"class":3206},[3186,8402,8403],{"class":3188,"line":5325},[3186,8404,3498],{"emptyLinePlaceholder":3497},[3186,8406,8407,8410,8412,8414,8417,8419,8421,8424,8426,8428],{"class":3188,"line":7070},[3186,8408,8409],{"class":3417},"                failures",[3186,8411,3080],{"class":3206},[3186,8413,3559],{"class":3407},[3186,8415,8416],{"class":3206},"((",[3186,8418,4003],{"class":3417},[3186,8420,3963],{"class":3206},[3186,8422,8423],{"class":3417},"available",[3186,8425,3963],{"class":3206},[3186,8427,4035],{"class":3417},[3186,8429,4493],{"class":3206},[3186,8431,8432],{"class":3188,"line":7075},[3186,8433,8314],{"class":3206},[3186,8435,8436],{"class":3188,"line":7088},[3186,8437,4275],{"class":3206},[3186,8439,8440],{"class":3188,"line":7093},[3186,8441,3498],{"emptyLinePlaceholder":3497},[3186,8443,8444,8446,8448,8451,8453,8456,8458,8460],{"class":3188,"line":7104},[3186,8445,4189],{"class":3504},[3186,8447,3508],{"class":3206},[3186,8449,8450],{"class":3417},"failures",[3186,8452,3080],{"class":3206},[3186,8454,8455],{"class":3417},"Count",[3186,8457,7581],{"class":3206},[3186,8459,4511],{"class":3874},[3186,8461,3421],{"class":3206},[3186,8463,8464],{"class":3188,"line":7115},[3186,8465,4247],{"class":3206},[3186,8467,8468],{"class":3188,"line":7126},[3186,8469,8470],{"class":3192},"            // Якщо хоч один товар недоступний → відкотити всі резервування\n",[3186,8472,8473,8475,8477,8479,8481],{"class":3188,"line":7137},[3186,8474,4252],{"class":3199},[3186,8476,5081],{"class":3417},[3186,8478,3080],{"class":3206},[3186,8480,7634],{"class":3407},[3186,8482,3651],{"class":3206},[3186,8484,8485],{"class":3188,"line":7146},[3186,8486,3498],{"emptyLinePlaceholder":3497},[3186,8488,8489,8491,8494,8496,8499,8501,8503,8505,8507,8509,8512],{"class":3188,"line":7151},[3186,8490,4265],{"class":3504},[3186,8492,8493],{"class":3417}," ReservationResult",[3186,8495,3080],{"class":3206},[3186,8497,8498],{"class":3407},"Failed",[3186,8500,3411],{"class":3206},[3186,8502,8450],{"class":3417},[3186,8504,3080],{"class":3206},[3186,8506,8378],{"class":3407},[3186,8508,3411],{"class":3206},[3186,8510,8511],{"class":3417},"f",[3186,8513,6764],{"class":3206},[3186,8515,8516,8519,8521,8523,8525,8528,8530,8533,8535,8537,8539,8542,8544,8547,8549,8551,8553,8556,8558,8560],{"class":3188,"line":7156},[3186,8517,8518],{"class":3530},"                $\"Product ",[3186,8520,4590],{"class":4589},[3186,8522,8511],{"class":3417},[3186,8524,3080],{"class":4589},[3186,8526,8527],{"class":3417},"ProductId",[3186,8529,4599],{"class":4589},[3186,8531,8532],{"class":3530},": requested ",[3186,8534,4590],{"class":4589},[3186,8536,8511],{"class":3417},[3186,8538,3080],{"class":4589},[3186,8540,8541],{"class":3417},"Requested",[3186,8543,4599],{"class":4589},[3186,8545,8546],{"class":3530},", available ",[3186,8548,4590],{"class":4589},[3186,8550,8511],{"class":3417},[3186,8552,3080],{"class":4589},[3186,8554,8555],{"class":3417},"Available",[3186,8557,4599],{"class":4589},[3186,8559,4602],{"class":3530},[3186,8561,4493],{"class":3206},[3186,8563,8564],{"class":3188,"line":7175},[3186,8565,4275],{"class":3206},[3186,8567,8568],{"class":3188,"line":7180},[3186,8569,3498],{"emptyLinePlaceholder":3497},[3186,8571,8572],{"class":3188,"line":7185},[3186,8573,8574],{"class":3192},"        // Зберегти резервування\n",[3186,8576,8577,8579,8581,8584,8586,8589,8591,8594],{"class":3188,"line":7190},[3186,8578,6945],{"class":3417},[3186,8580,3080],{"class":3206},[3186,8582,8583],{"class":3417},"StockReservations",[3186,8585,3080],{"class":3206},[3186,8587,8588],{"class":3407},"AddRange",[3186,8590,3411],{"class":3206},[3186,8592,8593],{"class":3417},"reservations",[3186,8595,3485],{"class":3206},[3186,8597,8598,8600,8602,8604,8606],{"class":3188,"line":7203},[3186,8599,3724],{"class":3199},[3186,8601,6661],{"class":3417},[3186,8603,3080],{"class":3206},[3186,8605,3592],{"class":3407},[3186,8607,3651],{"class":3206},[3186,8609,8610,8612,8614,8616,8618],{"class":3188,"line":7212},[3186,8611,3724],{"class":3199},[3186,8613,5081],{"class":3417},[3186,8615,3080],{"class":3206},[3186,8617,5278],{"class":3407},[3186,8619,3651],{"class":3206},[3186,8621,8622],{"class":3188,"line":7217},[3186,8623,3498],{"emptyLinePlaceholder":3497},[3186,8625,8626,8628,8630,8632,8635,8637,8639],{"class":3188,"line":7243},[3186,8627,5027],{"class":3504},[3186,8629,8493],{"class":3417},[3186,8631,3080],{"class":3206},[3186,8633,8634],{"class":3407},"Success",[3186,8636,3411],{"class":3206},[3186,8638,8593],{"class":3417},[3186,8640,3485],{"class":3206},[3186,8642,8643],{"class":3188,"line":7248},[3186,8644,3737],{"class":3206},[3186,8646,8647],{"class":3188,"line":7259},[3186,8648,3498],{"emptyLinePlaceholder":3497},[3186,8650,8651],{"class":3188,"line":7302},[3186,8652,8653],{"class":3192},"    // Звільнення резервування (при скасуванні або закінченні часу)\n",[3186,8655,8656,8658,8660,8662,8665,8667,8669,8672],{"class":3188,"line":7307},[3186,8657,5397],{"class":3199},[3186,8659,3400],{"class":3199},[3186,8661,3404],{"class":3403},[3186,8663,8664],{"class":3407}," ReleaseReservationAsync",[3186,8666,3411],{"class":3206},[3186,8668,4889],{"class":3403},[3186,8670,8671],{"class":3417}," reservationId",[3186,8673,3421],{"class":3206},[3186,8675,8676],{"class":3188,"line":7312},[3186,8677,3719],{"class":3206},[3186,8679,8680,8682,8684,8686,8688,8690,8692,8694,8696,8698,8700],{"class":3188,"line":7317},[3186,8681,8030],{"class":3504},[3186,8683,5078],{"class":3199},[3186,8685,5081],{"class":3417},[3186,8687,3445],{"class":3206},[3186,8689,3448],{"class":3199},[3186,8691,6661],{"class":3417},[3186,8693,3080],{"class":3206},[3186,8695,5092],{"class":3417},[3186,8697,3080],{"class":3206},[3186,8699,5097],{"class":3407},[3186,8701,3651],{"class":3206},[3186,8703,8704],{"class":3188,"line":7323},[3186,8705,3498],{"emptyLinePlaceholder":3497},[3186,8707,8708,8710,8713,8715,8717,8719,8721],{"class":3188,"line":7343},[3186,8709,4158],{"class":3199},[3186,8711,8712],{"class":3417}," reservation",[3186,8714,3445],{"class":3206},[3186,8716,3448],{"class":3199},[3186,8718,6661],{"class":3417},[3186,8720,3080],{"class":3206},[3186,8722,8723],{"class":3417},"StockReservations\n",[3186,8725,8726,8728,8730,8732,8735,8737,8739,8741,8743,8745,8748],{"class":3188,"line":7370},[3186,8727,7447],{"class":3206},[3186,8729,4938],{"class":3407},[3186,8731,3411],{"class":3206},[3186,8733,8734],{"class":3417},"r",[3186,8736,3469],{"class":3206},[3186,8738,8734],{"class":3417},[3186,8740,3080],{"class":3206},[3186,8742,4420],{"class":3417},[3186,8744,3479],{"class":3206},[3186,8746,8747],{"class":3417},"reservationId",[3186,8749,3855],{"class":3206},[3186,8751,8752,8755,8757,8759,8761,8764],{"class":3188,"line":7375},[3186,8753,8754],{"class":3417},"                                      r",[3186,8756,3080],{"class":3206},[3186,8758,6825],{"class":3417},[3186,8760,3479],{"class":3206},[3186,8762,8763],{"class":3530},"\"Active\"",[3186,8765,3485],{"class":3206},[3186,8767,8768],{"class":3188,"line":7402},[3186,8769,3498],{"emptyLinePlaceholder":3497},[3186,8771,8772,8774,8776,8779,8781,8783],{"class":3188,"line":7414},[3186,8773,4189],{"class":3504},[3186,8775,3508],{"class":3206},[3186,8777,8778],{"class":3417},"reservation",[3186,8780,3846],{"class":3199},[3186,8782,4561],{"class":3199},[3186,8784,3421],{"class":3206},[3186,8786,8787],{"class":3188,"line":7419},[3186,8788,4247],{"class":3206},[3186,8790,8791,8793,8795,8797,8799],{"class":3188,"line":7425},[3186,8792,4252],{"class":3199},[3186,8794,5081],{"class":3417},[3186,8796,3080],{"class":3206},[3186,8798,7634],{"class":3407},[3186,8800,3651],{"class":3206},[3186,8802,8803,8805],{"class":3188,"line":7444},[3186,8804,4265],{"class":3504},[3186,8806,3219],{"class":3206},[3186,8808,8809],{"class":3188,"line":7464},[3186,8810,4275],{"class":3206},[3186,8812,8813],{"class":3188,"line":7473},[3186,8814,3498],{"emptyLinePlaceholder":3497},[3186,8816,8817],{"class":3188,"line":7478},[3186,8818,8819],{"class":3192},"        // Повернути товар на склад\n",[3186,8821,8822,8824,8826,8828],{"class":3188,"line":7502},[3186,8823,3724],{"class":3199},[3186,8825,6661],{"class":3417},[3186,8827,3080],{"class":3206},[3186,8829,4399],{"class":3417},[3186,8831,8832,8834,8836,8838,8840,8842,8844,8846,8848,8850,8852,8854,8856],{"class":3188,"line":7507},[3186,8833,7447],{"class":3206},[3186,8835,4407],{"class":3407},[3186,8837,3411],{"class":3206},[3186,8839,2965],{"class":3417},[3186,8841,3469],{"class":3206},[3186,8843,2965],{"class":3417},[3186,8845,3080],{"class":3206},[3186,8847,4420],{"class":3417},[3186,8849,3479],{"class":3206},[3186,8851,8778],{"class":3417},[3186,8853,3080],{"class":3206},[3186,8855,8527],{"class":3417},[3186,8857,3421],{"class":3206},[3186,8859,8860,8862,8864,8866,8868],{"class":3188,"line":7513},[3186,8861,7447],{"class":3206},[3186,8863,4447],{"class":3407},[3186,8865,3411],{"class":3206},[3186,8867,4452],{"class":3417},[3186,8869,6764],{"class":3206},[3186,8871,8872,8875,8877,8879,8881,8883,8885,8887,8889,8891,8893,8895,8897,8899,8901,8903,8906,8908,8910,8913],{"class":3188,"line":7540},[3186,8873,8874],{"class":3417},"                s",[3186,8876,3080],{"class":3206},[3186,8878,4461],{"class":3407},[3186,8880,3411],{"class":3206},[3186,8882,2965],{"class":3417},[3186,8884,3469],{"class":3206},[3186,8886,2965],{"class":3417},[3186,8888,3080],{"class":3206},[3186,8890,4029],{"class":3417},[3186,8892,3963],{"class":3206},[3186,8894,2965],{"class":3417},[3186,8896,3469],{"class":3206},[3186,8898,2965],{"class":3417},[3186,8900,3080],{"class":3206},[3186,8902,4029],{"class":3417},[3186,8904,8905],{"class":3206}," + ",[3186,8907,8778],{"class":3417},[3186,8909,3080],{"class":3206},[3186,8911,8912],{"class":3417},"ReservedQty",[3186,8914,4493],{"class":3206},[3186,8916,8917],{"class":3188,"line":7556},[3186,8918,3498],{"emptyLinePlaceholder":3497},[3186,8920,8921,8924,8926,8928,8930,8933],{"class":3188,"line":7572},[3186,8922,8923],{"class":3417},"        reservation",[3186,8925,3080],{"class":3206},[3186,8927,6825],{"class":3417},[3186,8929,3445],{"class":3206},[3186,8931,8932],{"class":3530},"\"Released\"",[3186,8934,3219],{"class":3206},[3186,8936,8937,8939,8941,8944,8946,8948,8950,8952],{"class":3188,"line":7588},[3186,8938,8923],{"class":3417},[3186,8940,3080],{"class":3206},[3186,8942,8943],{"class":3417},"ReleasedAt",[3186,8945,3445],{"class":3206},[3186,8947,5225],{"class":3417},[3186,8949,3080],{"class":3206},[3186,8951,5230],{"class":3417},[3186,8953,3219],{"class":3206},[3186,8955,8956,8958,8960,8962,8964],{"class":3188,"line":7604},[3186,8957,3724],{"class":3199},[3186,8959,6661],{"class":3417},[3186,8961,3080],{"class":3206},[3186,8963,3592],{"class":3407},[3186,8965,3651],{"class":3206},[3186,8967,8968],{"class":3188,"line":7609},[3186,8969,3498],{"emptyLinePlaceholder":3497},[3186,8971,8972,8974,8976,8978,8980],{"class":3188,"line":7620},[3186,8973,3724],{"class":3199},[3186,8975,5081],{"class":3417},[3186,8977,3080],{"class":3206},[3186,8979,5278],{"class":3407},[3186,8981,3651],{"class":3206},[3186,8983,8984],{"class":3188,"line":7625},[3186,8985,3737],{"class":3206},[3186,8987,8988],{"class":3188,"line":7639},[3186,8989,3604],{"class":3206},[2996,8991],{},[2960,8993,8995],{"id":8994},"практичні-завдання-частина-1","Практичні завдання (Частина 1)",[3003,8997,8999],{"id":8998},"рівень-1-базовий","Рівень 1 — Базовий",[9001,9002,9003,9008,9011,9035,9040,9049,9072,9077],"steps",{},[2965,9004,9005],{},[2978,9006,9007],{},"Завдання 1.1: Read Phenomena симуляція",[2965,9009,9010],{},"Напишіть три тести що демонструють:",[9012,9013,9014,9022,9027],"ol",{},[3257,9015,9016,9018,9019,9021],{},[2978,9017,3052],{},": два паралельні ",[2969,9020,3075],{}," запити до одного рядка отримують різні значення (змоделюйте через два DbContext)",[3257,9023,9024,9026],{},[2978,9025,3089],{},": перший SELECT COUNT = 5, після INSERT іншою транзакцією — другий SELECT COUNT = 6",[3257,9028,9029,9034],{},[2978,9030,9031,9032],{},"Захист через ",[2969,9033,3071],{},": перший сценарій не відтворюється при цьому рівні ізоляції",[2965,9036,9037],{},[2978,9038,9039],{},"Завдання 1.2: Check-Then-Act безпека",[2965,9041,9042,9043,9046,9047,4099],{},"Для ",[2969,9044,9045],{},"Username"," в таблиці ",[2969,9048,3456],{},[9012,9050,9051,9057,9066],{},[3257,9052,9053,9054,9056],{},"Додайте UNIQUE INDEX на ",[2969,9055,9045],{}," через міграцію",[3257,9058,9059,9060,9063,9064],{},"Реалізуйте ",[2969,9061,9062],{},"RegisterAsync"," без попередньої перевірки — лише обробка ",[2969,9065,3747],{},[3257,9067,9068,9069],{},"Напишіть паралельний тест: 5 задач намагаються зареєструвати одне й те саме ім'я — рівно одна успішна, інші отримують ",[2969,9070,9071],{},"BusinessException",[2965,9073,9074],{},[2978,9075,9076],{},"Завдання 1.3: Атомарний UPDATE для інвентаризації",[2965,9078,9059,9079,9082,9083,9085,9086,9089],{},[2969,9080,9081],{},"ReserveStockAsync(int productId, int quantity)"," через ",[2969,9084,4447],{}," з умовою ",[2969,9087,9088],{},"Stock >= quantity",". Напишіть тест з 10 паралельними запитами резервування по 1 штуці з 5 наявних — рівно 5 мають повернути успіх.",[3003,9091,9093],{"id":9092},"рівень-2-логіка","Рівень 2 — Логіка",[9001,9095,9096,9101,9106,9117,9120,9130,9135],{},[2965,9097,9098],{},[2978,9099,9100],{},"Завдання 2.1: Write Skew Prevention",[2965,9102,9103,9104,4099],{},"Система чергувань лікарів: не меньше 1 лікаря у зміні. Відтворіть Write Skew за ",[2969,9105,3075],{},[9012,9107,9108,9111,9114],{},[3257,9109,9110],{},"Doctor A і B обидва бачать 2 лікарів у зміні",[3257,9112,9113],{},"Обидва вирішують піти",[3257,9115,9116],{},"Обидва успішно зберігають → 0 лікарів (порушення!)",[2965,9118,9119],{},"Вирішіть через:",[3254,9121,9122,9127],{},[3257,9123,9124,9126],{},[2969,9125,3103],{}," isolation level",[3257,9128,9129],{},"Або перевірку у тригері/check constraint",[2965,9131,9132],{},[2978,9133,9134],{},"Завдання 2.2: Idempotency Key для order creation",[2965,9136,9059,9137,9140,9141,9144,9145,9148],{},[2969,9138,9139],{},"IdempotencyKey"," таблицю і ",[2969,9142,9143],{},"CreateOrderAsync"," що приймає ",[2969,9146,9147],{},"Guid idempotencyKey",". При повторному виклику з тим самим ключем — повертає існуючий Order (без дублікату). При новому ключі — створює новий. Напишіть тест що симулює network retry.",[3003,9150,9152],{"id":9151},"рівень-3-архітектура","Рівень 3 — Архітектура",[9001,9154,9155,9160,9170,9228,9261],{},[2965,9156,9157],{},[2978,9158,9159],{},"Завдання 3.1: Distributed Lock для критичних секцій",[2965,9161,9162,9163,9082,9166,9169],{},"EF Core + SQL Server: реалізуйте ",[2969,9164,9165],{},"IDistributedLock",[2969,9167,9168],{},"sp_getapplock"," (SQL Server Application Lock):",[3017,9171,9173],{"className":3383,"code":9172,"language":3385,"meta":3025,"style":3025},"public async Task\u003Cbool> TryAcquireAsync(string resource, int timeoutMs);\npublic async Task ReleaseAsync(string resource);\n",[2969,9174,9175,9209],{"__ignoreMap":3025},[3186,9176,9177,9179,9181,9183,9185,9188,9190,9193,9195,9197,9200,9202,9204,9207],{"class":3188,"line":3189},[3186,9178,3397],{"class":3199},[3186,9180,3400],{"class":3199},[3186,9182,3404],{"class":3403},[3186,9184,4663],{"class":3206},[3186,9186,9187],{"class":3199},"bool",[3186,9189,4669],{"class":3206},[3186,9191,9192],{"class":3407},"TryAcquireAsync",[3186,9194,3411],{"class":3206},[3186,9196,3414],{"class":3199},[3186,9198,9199],{"class":3417}," resource",[3186,9201,3963],{"class":3206},[3186,9203,3957],{"class":3199},[3186,9205,9206],{"class":3417}," timeoutMs",[3186,9208,3485],{"class":3206},[3186,9210,9211,9213,9215,9217,9220,9222,9224,9226],{"class":3188,"line":3196},[3186,9212,3397],{"class":3199},[3186,9214,3400],{"class":3199},[3186,9216,3404],{"class":3403},[3186,9218,9219],{"class":3407}," ReleaseAsync",[3186,9221,3411],{"class":3206},[3186,9223,3414],{"class":3199},[3186,9225,9199],{"class":3417},[3186,9227,3485],{"class":3206},[3017,9229,9231],{"className":3180,"code":9230,"language":3182,"meta":3025,"style":3025},"-- sp_getapplock: іменоване блокування на рівні БД\nEXEC sp_getapplock @Resource='order_123', @LockMode='Exclusive', @LockTimeout=5000\n",[2969,9232,9233,9238],{"__ignoreMap":3025},[3186,9234,9235],{"class":3188,"line":3189},[3186,9236,9237],{"class":3192},"-- sp_getapplock: іменоване блокування на рівні БД\n",[3186,9239,9240,9243,9246,9249,9252,9255,9258],{"class":3188,"line":3196},[3186,9241,9242],{"class":3199},"EXEC",[3186,9244,9245],{"class":3206}," sp_getapplock @Resource=",[3186,9247,9248],{"class":3530},"'order_123'",[3186,9250,9251],{"class":3206},", @LockMode=",[3186,9253,9254],{"class":3530},"'Exclusive'",[3186,9256,9257],{"class":3206},", @LockTimeout=",[3186,9259,9260],{"class":3874},"5000\n",[2965,9262,9263,9264,9267],{},"Використайте для захисту ",[2969,9265,9266],{},"ReserveStockAsync"," на рівні конкретного продукту (не всієї таблиці).",[2996,9269],{},[2960,9271,9273],{"id":9272},"підсумок-частини-1","Підсумок частини 1",[2965,9275,9276],{},"Перша частина розкрила теоретичну і практичну основу конкурентності:",[3254,9278,9279,9285,9291,9297,9306],{},[3257,9280,9281,9284],{},[2978,9282,9283],{},"Read Phenomena",": Dirty, Non-Repeatable, Phantom Read — кожен з прикладом реального бізнес-наслідку. Write Skew як найскладніша аномалія що порушує інваріанти без «видимих» помилок.",[3257,9286,9287,9290],{},[2978,9288,9289],{},"MVCC vs Lock-based",": PostgreSQL зберігає версії рядків — читачі не блокуються. SQL Server використовує lock за замовчуванням (RCSI — альтернатива).",[3257,9292,9293,9296],{},[2978,9294,9295],{},"Check-Then-Act Race Condition",": Unique Index + DbUpdateException — єдиний надійний захист.",[3257,9298,9299,9302,9303,9305],{},[2978,9300,9301],{},"Double Spending",": Атомарний ",[2969,9304,4447],{}," з умовою або Optimistic Concurrency retry loop.",[3257,9307,9308,9311],{},[2978,9309,9310],{},"Duplicate Insert",": Idempotency Key — архітектурне рішення для мережевих retry-ів.",[2965,9313,9314,9319],{},[9315,9316,9318],"a",{"href":9317},"/csharp/ef-core/22.concurrency-part2","У другій частині"," — Lock Escalation і дедлоки, детектування та розрив дедлоків, SELECT FOR UPDATE SKIP LOCKED для queue processing, та monitoring concurrency проблем у production.",[9321,9322,9323],"style",{},"html pre.shiki code .spJ8K, html code.shiki .spJ8K{--shiki-light:#008000;--shiki-default:#6A9955;--shiki-dark:#6A9955}html pre.shiki code .su1O8, html code.shiki .su1O8{--shiki-light:#0000FF;--shiki-default:#569CD6;--shiki-dark:#569CD6}html pre.shiki code .sHH4Y, html code.shiki .sHH4Y{--shiki-light:#000000;--shiki-default:#D4D4D4;--shiki-dark:#D4D4D4}html .light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html.light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html .default .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: 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.sCDza{--shiki-light:#AF00DB;--shiki-default:#CE92A4;--shiki-dark:#CE92A4}html pre.shiki code .sbdoH, html code.shiki .sbdoH{--shiki-light:#A31515;--shiki-default:#CE9178;--shiki-dark:#CE9178}html pre.shiki code .sJj4R, html code.shiki .sJj4R{--shiki-light:#098658;--shiki-default:#B5CEA8;--shiki-dark:#B5CEA8}html pre.shiki code .sD7JJ, html code.shiki .sD7JJ{--shiki-light:#000000FF;--shiki-default:#D4D4D4;--shiki-dark:#D4D4D4}html pre.shiki code .sjcCO, html code.shiki .sjcCO{--shiki-light:#EE0000;--shiki-default:#D7BA7D;--shiki-dark:#D7BA7D}",{"title":3025,"searchDepth":3196,"depth":3196,"links":9325},[9326,9327,9333,9338,9343,9349,9353,9358],{"id":2962,"depth":3196,"text":2963},{"id":3000,"depth":3196,"text":3001,"children":9328},[9329,9330,9331,9332],{"id":3005,"depth":3424,"text":3006},{"id":3046,"depth":3424,"text":3047},{"id":3083,"depth":3424,"text":3084},{"id":3110,"depth":3424,"text":3111},{"id":3140,"depth":3196,"text":3141,"children":9334},[9335,9336,9337],{"id":3147,"depth":3424,"text":3148},{"id":3228,"depth":3424,"text":3229},{"id":3277,"depth":3424,"text":3278},{"id":3369,"depth":3196,"text":3370,"children":9339},[9340,9341,9342],{"id":3376,"depth":3424,"text":3377},{"id":3930,"depth":3424,"text":3931},{"id":4625,"depth":3424,"text":4626},{"id":5332,"depth":3196,"text":5333,"children":9344},[9345,9346,9347,9348],{"id":5351,"depth":3424,"text":5352},{"id":5597,"depth":3424,"text":5598},{"id":5944,"depth":3424,"text":5945},{"id":6356,"depth":3424,"text":6357},{"id":6621,"depth":3196,"text":6622,"children":9350},[9351,9352],{"id":6625,"depth":3424,"text":6626},{"id":7867,"depth":3424,"text":7868},{"id":8994,"depth":3196,"text":8995,"children":9354},[9355,9356,9357],{"id":8998,"depth":3424,"text":8999},{"id":9092,"depth":3424,"text":9093},{"id":9151,"depth":3424,"text":9152},{"id":9272,"depth":3196,"text":9273},"Глибокий розбір конкурентності в EF Core — Read Phenomena (dirty read, non-repeatable read, phantom read), MVCC у PostgreSQL vs Lock-based у SQL Server, практичні сценарії race conditions та їх вирішення через правильні стратегії блокування.","md",null,{},{"title":603,"description":9359},"YBIqn8d_uFUel5_JgMeXQyUgOKvpJMKSzlT_fDbbLDY",[9366,9368],{"title":599,"path":600,"stem":601,"description":9367,"children":-1},"Optimistic Concurrency з ConcurrencyToken і RowVersion — виявлення конфліктів при одночасному записі. Pessimistic Locking через SELECT FOR UPDATE. Outbox Pattern для надійного запису разом із зовнішніми сервісами. Unit of Work.",{"title":607,"path":608,"stem":609,"description":9369,"children":-1},"Lock Escalation і дедлоки в EF Core — як вони виникають і як їх уникати. SELECT FOR UPDATE SKIP LOCKED для надійного queue processing. Monitoring конкурентних проблем у production. Concurrency Patterns для реальних систем.",1777912595278]