排序

    tableCompareByShow: (obj1, obj2) => {
                let value1, value2
                if (obj1 && obj1.show_num) {
                    value1 = obj1.show_num
                }
                if (obj2 && obj2.show_num) {
                    value2 = obj2.show_num
                }
                if (value1 < value2) {
                    return 1
                } else if (value1 > value2) {
                    return -1
                } else {
                    return 0
                }
            },