SOURCE

//变量解构
//返回一个数组
function example() {
    return [1, 2, 3]
}
let [a, b, c] = example()

console.log([a, b, c])

//返回一个对象
function exampleClass(){
    return{
        foo:1,
        bar:2
    };
}
let {foo,bar} =exampleClass()
console.log({foo,bar})

//遍历Map结构
var map = new Map()
map.set('first','hello');
map.set('second','world');

for(let [key,value] of map){
    console.log(key + " is " + value);
}