js根据指定key对json数组排序

<script>
    var sort_arry1 = [
        {"num": 1},
        {"num": 7},
        {"num": 3},
        {"num": 2},
    ];
    var sort_arry2 = [
        {"num": 1},
        {"num": 7},
        {"num": 3},
        {"num": 2},
    ];
    var compare = function (json_key,reverse=false) {
        return function (obj1, obj2) {
            var return_num = 0;
            var val1 = obj1[json_key];
            var val2 = obj2[json_key];
            if (!isNaN(Number(val1)) && !isNaN(Number(val2))) {
                val1 = Number(val1);
                val2 = Number(val2);
            }
            if (val1 < val2) {
                return_num = -1;
            } else if (val1 > val2) {
                return_num = 1;
            }
            if(reverse){
                return -return_num
            }
            else{
                return return_num
            }
        }
    };
    sort_arry1 = sort_arry1.sort(compare("num"));
    console.log(sort_arry1);
    sort_arry2 = sort_arry2.sort(compare("num",true));
    console.log(sort_arry2);
</script>

结果