VIP32/ts/晚课/2.类型/2.ts

// object：object function array 

/**
 * 对象语法
 * {属性名：类型,属性名？：类型...}
 */
// ？ 代表属性可选 添加到属性名后
// [propName:string]:any 在当前对象后添加任意个数的任意类型的任意数据
let a:{name:string,age?:number,[propName:string]:any};
a = {
    name:"孙悟空",
    age: 20
}
a = {
    name:"猪八戒"
}
a = {
    name:"孙悟空",
    age: 20,
    sex: "男",
    hobby: "吃仙丹"
}
/**
 * 函数语法
 * (形参：类型,形参：类型,形参：类型,) => 返回值类型
 */
let b:(name:string,age:number) => string;
b = function(name:string,age:number):string {
    return name + age;
}
console.log(b('11',2))

/**
 * 数组语法：
 *  类型[]
 * Array<类型>
 */
let c:[];
// 字符串数组
let d:string[];
d = ['1','1','1','2'];
let e:boolean[];
e = [true,false]
let f:Array<string>;
f = ['2','2','3']
/**
 * 元祖：固定长度的数组
 */
let g:[number,string,boolean];
g = [1,'2',true];
/**
 * 枚举 
 * enum 对象名称  {
 *  value
 * }
 */
enum Sex {
    man,
    woman
}

let h:{
    name:string,
    age:number,
    sex:Sex
}
h = {
    name:"孙悟空",
    age:20,
    sex: Sex.man
}

console.log(h.sex === Sex.man ? '男' : '女');

// 逻辑运算符 &

let i:{name:string} & {age:number};
i = {
    name:"孙悟空",
    age:20
}

// 类型别名
type myType = 1|2|3|4;
let j:myType;
let k:myType;
let l:myType;
let m:myType;


export{};