Question

js中有["1","2","3","4"]这样一个string，怎么把它变成array

["1","2","3","4"]这是从后台通过JSONArray返回的
用split分的话很麻烦

Answer 1

通过eval()把字符串转换成array.

代码：

<script>
var str = '["1","2","3","4"]';//相关字符串
var arr = eval(str);//通过eval执行字符串，结果arr是一个数组，数组内容是"1","2","3","4"
</script>

补充：

eval() 函数可计算某个字符串，并执行其中的的 JavaScript 代码，并返回通过计算 string 得到的值

Answer 2

<script>
var temp = '["1","2","3","4"]';
var ary = eval('(' + temp + ')');
for (var i = 0 ;i<ary.length;i++){
alert(ary[i]);
}
</script>

Answer 3

都把它SET进去！