JavaScript的两种数组遍历

沿着一定的顺序对数组内部的元素做一次切仅做一次访问，就是遍历。

for循环 遍历

for-in遍历

<script type="text/javascript">
    var color = ["red", "blue", "green"];
    color["jinse"] = "gold";
    color[10] = "pink";

    //1、for循环遍历，为了遍历效果更好，数组下标最好为0/1/2...
    for(var i = 0; i < color.length; i++){
        console.log(i + "--" + color[i]);
    }
</script>

结果：

<script type="text/javascript">
    var color = ["red", "blue", "green"];
    color["jinse"] = "gold";
    color[10] = "pink";

    //2、for-in
    for(var k in color){
        console.log(k + "==" + color[k])
    }
</script>

结果：