标签：
1.字符串转数组
var s = "abc,abcd,aaa";
ss = s.split(",");// 在每个逗号(,)处进行分解。
2.数组转字符串
var a, b;
a = new Array(0,1,2,3,4);
b = a.join(",");
3.查询数组中是否包含某元素
var num=jQuery.inArray(value, array);
解释：返回value在数组中的位置，从0开始计数(如果没有找到则返回 -1 )。
4.js中去除重复
参考其他人总结：
4.1
Array.prototype.unique1 = function () {
var r = new Array(); label:for(var i = 0, n = this.length; i < n; i++) { for(var x = 0, y = r.length; x < y; x++) { if(r[x] == this[i]) { continue label; } } r[r.length] = this[i]; } return r;}Array.prototype.unique2 = function () {
return this.sort().join(",,").replace(/(,|^)([^,]+)(,,\2)+(,|$)/g,"$1$2$4").replace(/,,+/g,",").replace(/,$/,"").split(",");}rray.prototype.unique3 = function() {
var temp = {}, len = this.length; for(var i=0; i < len; i++) { var tmp = this[i]; if(!temp.hasOwnProperty(tmp)) { temp[this[i]] = "my god"; } } len = 0; var tempArr=[]; for(var i in temp) { tempArr[len++] = i; } return tempArr;}Array.prototype.unique4 = function () {
var temp = new Array(); this.sort(); for(i = 0; i < this.length; i++) { if( this[i] == this[i+1]) { continue; } temp[temp.length]=this[i]; } return temp; }Array.prototype.unique5 = function() {
var res = [], hash = {}; for(var i=0, elem; (elem = this[i]) != null; i++) { if (!hash[elem]) { res.push(elem); hash[elem] = true; } } return res;}标签：
原文地址：http://www.cnblogs.com/jiangyaqiong/p/4758229.html
