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victorsun
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‎.vscode/launch.json‎

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{
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// 使用 IntelliSense 了解相关属性。
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// 悬停以查看现有属性的描述。
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// 欲了解更多信息，请访问: https://go.microsoft.com/fwlink/?linkid=830387
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"version": "0.2.0",
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"configurations": [
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{
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"name": "ts-node",
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"type": "node",
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"request": "launch",
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"args": [
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"${relativeFile}"
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],
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"runtimeArgs": [
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"-r",
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"ts-node/register"
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],
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"cwd": "${workspaceRoot}",
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"protocol": "inspector",
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"internalConsoleOptions": "openOnSessionStart"
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}
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]
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}

‎18-TypeScript/01-start.ts‎

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interface Person {
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firstName: string;
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lastName: string;
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}
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function greeter(person: Person) {
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return "Hello, " + person.firstName + " " + person.lastName;
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}
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let user = { firstName: "Jane", lastName: "User" };
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console.log(greeter(user));

‎18-TypeScript/02-dataType.ts‎

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18-TypeScript/01-入门.html renamed to 18-TypeScript/old/01-入门.html

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18-TypeScript/02-1-变量申明.ts renamed to 18-TypeScript/old/02-1-变量申明.ts

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‎18-TypeScript/old/02-dataType.ts‎

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/**
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* Boolean Number String
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* Array Enum
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* Any Void
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*/
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// 【 Boolean 】
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let isDone: boolean = false
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// 【 Number 】
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let decLiteral: number = 20
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let hexLiteral: number = 0x14
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let binaryLiteral: number = 0b10100 // ECMAScript 2015 中引入的二进制字面量
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let octalLiteral: number = 0o24 // ECMAScript 2015 中引入的八进制字面量
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// 【 String 】
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var nameStr: string = 'csxiaoyao'
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let sentence: string = `Hello, my name is ${ nameStr }. I'm ${ decLiteral + 1 } years old.`
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// 【 Array 】 两种方式
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var list1: number[] = [1,2,3];
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var list2: Array<string> = ["csxiaoyao","sunshine"];
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// 【 Tuple 】 元祖，允许表示一个已知元素数量和类型的数组，各元素的类型不必相同
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let x: [string, number]
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x = ['hello', 10] // OK
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// 【 Enum 】 使用枚举类型可以为一组数值赋予友好的名字，可以由枚举的值得到它的名字
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enum Color { Red, Green=5, Blue=2, Purple };
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var colorName0: string = Color[0]; // Red
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var colorName1: string = Color[1]; // undefined
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var colorName2: string = Color[2]; // Blue
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var colorName3: string = Color[3]; // Purple
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var colorName5: string = Color[5]; // Green
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var c1: Color = Color.Green; // 5
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var c2: Color = Color.Red // 0
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var c3: Color = Color.Purple // 3
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// 【 Any 】
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var notSure: any = 10;
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notSure = "Hello";
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notSure = false;
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var list: any[] = [10, "hello", false];
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// 【 Void 】 和 any 类型相反，表示没有任何类型
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// 声明一个void类型的变量没有什么大用，只能赋值 undefined / null
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function say(): void {
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// body...
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}
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let unusable: void = undefined;
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// 【 null 】 / 【 undefined 】 默认情况下 null 和 undefined 是所有类型的子类型
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let u: undefined = undefined
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let n: null = null
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// decLiteral = n; // 配置 --strictNullChecks，否则，可以把 null 和 undefined 赋值给其他类型的变量
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// 【 never 】表示永不存在的值的类型
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function error(message: string): never {
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throw new Error(message)
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}
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// 推断的返回值类型为never
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function fail() {
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return error("Something failed");
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}
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// 返回never的函数必须存在无法达到的终点
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function infiniteLoop(): never {
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while (true) {
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}
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}
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// 【 object 】 表示非原始类型，即除 number，string，boolean，symbol，null或undefined 之外的类型
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declare function create(o: object | null): void
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create({ prop: 0 }) // OK
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create(null) // OK
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// create(42); // Error
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// create("string"); // Error
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// create(false); // Error
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// create(undefined); // Error
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// 【 类型断言 】 两种方式
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let someValue: any = 'this is a string'
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// 方式1：尖括号
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let strLength1: number = (<string>someValue).length
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// 方式1：as
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let strLength2: number = (someValue as string).length

18-TypeScript/03-class.ts renamed to 18-TypeScript/old/03-class.ts

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18-TypeScript/04-accessors&static.ts renamed to 18-TypeScript/old/04-accessors&static.ts

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18-TypeScript/05-function.ts renamed to 18-TypeScript/old/05-function.ts

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18-TypeScript/06-interface.ts renamed to 18-TypeScript/old/06-interface.ts

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