js正则匹配数组中不重复的元素

zswang.js

var arr=["a","b","c","a","ba","bc"];
alert(arr.join(",").match( /([^,]+)(?!.*,\1(,|$))/ig));
 
 
Array.prototype.deleteEle=function(){
    var arr=this,o={},newArr=[],i;
    for( i=0;i<arr.length;i++){
        if(typeof(o[arr[i]])==="undefined"){
            newArr[newArr.length]=arr[i]
        }
    }
    return newArr;
}