3.6itreter

3.6iterator迭代

for of遍历具体内容for in遍历下标

1.遍历数组

var arr=[6,5,8];
for (var x of arr){
    console.log(x)
}

 

2.遍历Map

var map=new Map([['ni',6],['wo',5],['ta',8]])
for (var x of map){
    console.log(x)
}

 3.遍历Set

var set=new Set([6,5,8]);
for (var x of set){
    console.log(x)
}