js数组字符串
<script type="text/javascript">
var arr = new Array(3) ;
arr[0] = "Jani";
arr[1] = "Hege";
arr[2] = "Stale";
document.write(arr.join() + "<br />");//默认情况下不提供分隔符,分隔符是“,”号;
document.write(arr.join("."));
var arr=[1,2,3];
console.log(arr+'');
console.log(arr.join());
//输出 1,2,3 数组就这样变成字符串了,
</script>
var arr=[1,2,3];
console.log(String(arr));