Question

我在骨干网上有一个应用程序，我使用该功能来创建笛卡尔积。

这是功能：

    function cartesian(arg) {
            var r = [], max = arg.length - 1;
            function helper(arr, i) {
                for (var j = 0, l = arg[i].length; j < l; j++) {
                    var a = arr.slice(0); // clone arr
                    a.push(arg[i][j]);
                    if (i == max) {
                        r.push(a);
                    } else helper(a, i + 1);
                }
            }
        helper([], 0);
        return r;
    }

要在骨干内调用它，我这样做：

return cartesian(_.values(this.rooms.groupBy('level')));

这是我的json被对象室提取的一个例子：

[{"hotelId":"10776","combination":"0|2|0|0|0","n_camere":2,"level":1,"id":"98%7E%7E%7Edouble_1"},
{"hotelId":"10776","combination":"1|0|1|0|0","n_camere":2,"level":1,"id":"99%7E%7E%7Esingle_1"},
{"hotelId":"10776","combination":"1|0|1|0|0","n_camere":2,"level":1,"id":"100%7E%7E%7Etriple_1"},
{"hotelId":"10776","combination":"1|0|0|0|0","n_camere":1,"level":2,"id":"98%7E%7E%7Edouble_2"}]

在这种使用笛卡尔积的模式中，我有三个按级别分组的数组，其中每个数组都有最后一个数组，因为level2是这样的：

{"hotelId":"10776","combination":"0|2|0|0|0","n_camere":2,"level":1,"id":"98%7E%7E%7Edouble_1"},
{"hotelId":"10776","combination":"1|0|0|0|0","n_camere":1,"level":2,"id":"98%7E%7E%7Edouble_2"}

---------------
    {"hotelId":"10776","combination":"1|0|1|0|0","n_camere":2,"level":1,"id":"99%7E%7E%7Esingle_1"},
{"hotelId":"10776","combination":"1|0|0|0|0","n_camere":1,"level":2,"id":"98%7E%7E%7Edouble_2"}

---------------
    {"hotelId":"10776","combination":"1|0|1|0|0","n_camere":2,"level":1,"id":"100%7E%7E%7Etriple_1"},
{"hotelId":"10776","combination":"1|0|0|0|0","n_camere":1,"level":2,"id":"98%7E%7E%7Edouble_2"}

。我要实现的是groupby级别和组合，因为在级别1中有一个具有相同组合字段的数组，我的目标是这样的数组：

{"hotelId":"10776","combination":"0|2|0|0|0","n_camere":2,"level":1,"id":"98%7E%7E%7Edouble_1"},
    {"hotelId":"10776","combination":"1|0|0|0|0","n_camere":1,"level":2,"id":"98%7E%7E%7Edouble_2"}

    ---------------
        {"hotelId":"10776","combination":"1|0|1|0|0","n_camere":2,"level":1,"id":"99%7E%7E%7Esingle_1"},
{"hotelId":"10776","combination":"1|0|1|0|0","n_camere":2,"level":1,"id":"100%7E%7E%7Etriple_1"},
    {"hotelId":"10776","combination":"1|0|0|0|0","n_camere":1,"level":2,"id":"98%7E%7E%7Edouble_2"}

是否可以获得此结果？

骨干笛卡尔产品与另一个groupBy

0 个答案: