Execution context ArgumentsHost class Current application context Host handler arguments ExecutionContext class Reflection and metadata Execution context Nest provides seve...

OpenAPI (Swagger) This chapter applies only to TypeScript Installation Bootstrap Body, query, path parameters Multiple specifications Working with enums Working with arrays ...

The Loop Problem The Loop Problem If you’ve ever programmed in JavaScript, you’ve probably written code that looks like this: var colors = [ "red" , "green" , "blue" ]...

Execution context ArgumentsHost class Current application context Host handler arguments ExecutionContext class Official enterprise support Reflection and metadata Execut...

Asynchronous providers Injection Example Asynchronous providers At times, the application start should be delayed until one or more asynchronous tasks are completed. For exa...

Harnessing the power of TypeScript & GraphQL Installation Overview Getting started with GraphQL & TypeScript GraphQL playground Multiple endpoints Code first Example Schema ...

Mapped types Partial Pick Omit Intersection Composition Mapped types Warning This chapter applies only to the code first approach. As you build out features like CRUD...

SQL调优关键参数调整 SQL调优关键参数调整 本节将介绍影响openGauss SQL调优性能的关键数据库主节点配置参数，配置方法参见配置运行参数 。 表 1 数据库主节点配置参数 参数/参考值 描述 enable_nestloop=on 控制查询优化器对嵌套循环连接（Nest Loop Join）类型的使用。当设置为“...

Promise 当这些概念可以用值表示时，处理抽象概念通常更容易。 在异步操作的情况下，你不需要安排将来某个时候调用的函数，而是返回一个代表这个未来事件的对象。 这是标准类Promise 的用途。 Promise 是一种异步行为，可以在某个时刻完成并产生一个值。 当值可用时，它能够通知任何感兴趣的人。 创建Promise 的最简单方法是调用Prom...

Overview of Godot’s key concepts Scenes Nodes The scene tree Signals Summary Overview of Godot’s key concepts Every game engine revolves around abstractions you use to buil...