js数组排序方法reverse sort 实例讲解

    var arr = [1,2,3,4,5];
    alert(arr.reverse());//5,4,3,2,1

    var arr = [3, 1, 2, 5, 4];
    alert(arr.sort());//1,2,3,4,5

    var arr = [3, 1, 2, 5, 4];
    alert(arr.sort(Compare));//1,2,3,4,5
    //自定义排序规则：正序
    function Compare(value1, value2) {
        if (value1 > value2) {
            return 1;
        } else if (value1 < value2) {
            return -1;
        } else {
            return 0;
        }
    }