forEach遍历小实例

<script>
    // forEach
    var arr = ['zhangsan','lisi','wangwu'];

    arr.forEach(function(value,key){
        console.log(value,key);
    })

    var obj = [
        {username:"zhagnsan",age:20,sex:1},
        {username:"lisi",age:20,sex:1},
        {username:"wangwu",age:20,sex:1},
    ];
    obj.forEach(function(value,key){
        console.log(value['username'],value['age'],value['sex']);
    })
</script>