@Pipe({ name: 'lowercase1' }) class LowerCasePipe1 implements PipeTransform { transform(value: string): string { if (!value) return value; if (typeof value !== 'string') { throw new Error('Invalid pipe value', value); } return value.toLowerCase(); } } 为了保持一致,让我们展示定...
function hashify(target: any, key: string) { var _value = this[key]; var getter = function () { return '#' + _value; }; var setter = function (newValue) { _value = newValue; }; if (delete this[key]) { Object.defineProperty(target, key, { get: getter, set: setter, enumera...
上面getHeroes(): Observable<Hero[]> 表示调用 getHeroes() 方法后返回的是一个 Observable 对象,<Hero[]> 用于表示该 Observable 对象的观察者,将会收到的数据类型。示例中表示将会返回 <Hero[]> 英雄列表。什么是枚举?枚举用来定义一些有名字的数字常量。枚举通过 enum 关键字来定义。// angular2/packages/...
dropDownEnumValue = Object.keys(Feedback).filter((key: string) => !isNaN(Number((Feedback as any)[key]))); } actionBegin(args: SaveEventArgs) { if (args.requestType === 'beginEdit' || args.requestType === 'add') { this.orderData = Object.assign({}, args.rowData); } if ...
expect(providers[0].key.displayName).toBe("Car"); expect(providers[1].key.displayName).toBe("Engine"); resolve() 解析图示 Provider 类型 export type Provider = TypeProvider | ValueProvider | ClassProvider | ExistingProvider | FactoryProvider | any[]; ...
- `REMOVE_STYLES_ON_COMPONENT_DESTROY` default value is now `true`. This causes CSS of components to be removed from the DOM when destroyed. You retain the previous behaviour by providing the `REMOVE_STYLES_ON_COMPONENT_DESTROY` injection token. ...
201b60e1d feat handle string key/value pairs, e.g. --define b847d4460 fix recommend optional application update migration during v19 update f249e7e85 perf enable Node.js compile code cache when available ecc107d83 perf enable Node.js compile code cache when available @angular-devkit/architect...
其中的value字段就是客户端传过来的参数...,如下所示:全部变为可选参数,参数的必传与否已经在校验函数中处理了类型全部变为any export type TextObjType = { content?...在我这个场景中,对象里所有key的类型校验都手动处理了,如果在此处定义了它的类型,在校验函数中就会报黄色警告,因此针对于需要手动校验类型的...
例子import { Component, OnInit } from '@angular/core'; import { FormBuilder, FormGroup, Validators, FormControl..., AbstractControl } from '@angular/forms'; impo...
arg.message + '\n' + arg.stack : arg.stack; - } else if (arg.sourceURL) { - arg = arg.message + '\n' + arg.sourceURL + ':' + arg.line; - } - } - return arg; +/** + * when using forEach the params are value, key, but it is often useful to have key, value....