JavaScript 数组去重

Array.prototype.unique = function () {

            var tem = {};
            var arr = [];
            var len = this.length;
            for (var i = 0; i < len; i++) {
                if (!tem[this[i]]) {
                    tem[this[i]] = "abc";   //不可以用this[i],防止有0的存在
                    arr.push(this[i]);
                }
            }
        }