JavaScript小练习(一) —— 删除数组中的重复项

var arr = [1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6];
            arr = qu(arr);

            function qu(arr) {
                var sub = [];
                for (var i = 0, len = arr.length; i < len; i++) {
                    var flag = false;
                    for (var j = 0, jlen = sub.length; j < jlen; j++) {
                        if (arr[i] == sub[j]) {
                            flag = true;
                            break;
                        }
                    }
                    if (!flag) {
                        sub.push(arr[i]);
                    }
                }
                return sub;
            }
            console.log(arr);

var arr = [1, 1,1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6,"a","a"];
            var sub = [];
            //forEach() 遍历数组
            arr.forEach(function(value){
            //indexOf()搜索数组中具有给定值的元素
                var index =sub.indexOf(value);
                if (index == -1) {
                        sub.push(value);
                    }
            })
            console.log(sub);