// ES5

        /**

         * 数组、字符串去重

         * @param  {[string/array]} [数组]

         * @return {[array]}    [返回数组]

         */

        Array.prototype.unique = function () {

            var obj = {};

            for (var i = 0; i < this.length; i++) {

                obj[this[i]] = this[i];

            }

            var newArr = [];

            for (var index in obj) {

                newArr.push(index);

            }

            return newArr;

        }

        // ES6

        let array = [1, 1, 1, 1, 2, 4, 4, 3, 5, 3];

        let set = new Set(array);

        let newArr = Array.from(set);

        // ES5

        console.log(array.unique());

        // ES6

        console.log(set); // 类数组

        console.log(newArr); // 数组