for....in 循环

Posted 2020-12-28 wangdashi

for....in 主要是来遍历对象

var obj={
   "1":       "first",
   "two":   "zoo",
    "3":       "2",
    "three":  "34",
    "4":        "1",
    "2":       "second"
};
for (var i in obj) { 
    console.log(i+":"+obj[i]);
};

输出结果：

//1:first
//2:second
//3:2
//4:1
//two:zoo
//three:34