ctg168的专栏

//==========================// 知识点：映射类型class People {name: string;age: number;height: number;address: string;}// 用途:// 1、可空类型的定义： // 按照下方这样创建一个People的实例的话，类的每个属性都可以返回空.type Nul

export interface StringValidator { isAcceptable(s: string): boolean;}const lettersRegexp = /^[A-Za-z]+$/;export class LettersOnlyValidator implements StringValidator { isAcceptable(s: stri

先看下这段代码：class Animal { type: string;}class Dog extends Animal { name: string}class AnimalArray { dog: Dog; readonly [index: number]: Dog; readonly [index: string]: Dog;

TypeScript接口构造的定义及使用方法。