javascript foreach

javascript foreach

对于一般对象，循环的临时变量为：属性值

<script type="text/javascript">
var obj = new Object();
obj.e="e";
obj.b="b";
obj.c="c";
obj.d="d";

for(var a in obj){
    console.log(a);
}
 
</script>

输出：a,e,c,d

对于数组，循环的临时变量为：0,1...

如：

<script type="text/javascript">
var arrays = ["a","b","c"];
for(var a in arrays){
    console.log(a);
}
 
</script>

输出：0,1,2