JS关于面试时数组去重最屌的写法--原型

~function () {
    var pro = Array.prototype;
    pro.myDistinct = function myDistinct() {
        var obj = {};
        for (var i = 0; i < this.length; i++) {
            var item = this[i];
            if(typeof obj[item]!== 'undefined'){
                this[i] = this[this.length - 1];
                this.length--;
                i--;
                continue;
            }
            obj[item] = item;
        }
        obj = null;
        return this;
    }
}();
var arr1 = [1,2,3,4,4,5,6,7,8,6];
console.log(arr1.myDistinct());