解构赋值

//1.基本用法

let name ='张三',age =18, sex ='男';

let [name,age,sex] = ['李四',20,'女'];

name='qaq';

console.log(name);

console.log(age);

console.log(sex);

//02-对象的解构赋值

let {name, age, sex} = {name:"张三",age:55,sex:'男'};

console.log(name);

console.log(age);

console.log(sex);

//通过键值对的形式并不能完全解析

let {name:str} = {name:"张三"};

console.log(name);//无打印结果

console.log(str);//张三

//03数组的解构赋值

// let [name,age,sex] = ['李四',20,'女'];

let [arr1,[arr2,arr3,[arr4,arr5]]] = [1,[2,3, [4,5]]];

console.log(arr1, arr2, arr3, arr4, arr5);          //1 2 3 4 5

let [a,b,c] = [1,2,3];

console.log(a); //1

console.log(b); //2

console.log(c); //3

let [a, ,c] = [1,2,3];

console.log(a); //1

console.log(c); //3

let [a, , ,c] = [1,2,3];

console.log(a); //1

console.log(c); //undefined

//04-基本类型的解构赋值

let [a,b,c,d,e] ='我是中国人';

console.log(a);    //我

console.log(b);    //是

console.log(c);    //中

console.log(d);    //国

console.log(e);    //人