如何使用多个日期时间列对javascript数组进行排序

Question

给出以下数组：

var effectiveDates= [
    {
        actualDate: "2017-08-29",
        effectiveDate: "2017-01-01",
        time: "13:22"
    },
    {
        actualDate: "2017-08-29",
        effectiveDate: "2017-01-01",
        time: "11:33"
    },
    {
        actualDate: "2017-08-29",
        effectiveDate: "2017-01-01",
        time: "10:57"
    },
    {
        actualDate: "2016-06-17",
        effectiveDate: "2016-01-01",
        time: "10:26"
    },
    {
        actualDate: "2016-06-17",
        effectiveDate: "2016-01-01",
        time: "10:03"
    },
    {
        actualDate: "2015-12-03",
        effectiveDate: "2015-01-01",
        time: "16:54"
    },
    {
        actualDate: "2014-07-07",
        effectiveDate: "2014-05-01",
        time: "10:47"
    },
    {
        actualDate: "2014-07-07",
        effectiveDate: "2014-05-01",
        time: "10:41"
    },
    {
        actualDate: "2014-07-07",
        effectiveDate: "2014-01-01",
        time: "10:36"
    },
    {
        actualDate: "2014-07-07",
        effectiveDate: "2014-01-01",
        time: "10:36"
    }
]

我试图根据actualDate或effectiveDate降序（或根据顺序升序）然后按时间（也根据所需的顺序升序或降序）对数据进行排序。 我遇到的问题是日期顺序正确，但time属性没有正确排序。 我使用moment.js进行日期和时间分析。

这是我到目前为止所尝试的：

var desc = true; //false;
effectiveDates.sort(function (a, b) {
            if (desc) {
                if (moment(a.actualDate) === moment(b.actualDate)) {
                    return (moment(b.time) - moment(a.time));
                } else if (moment(a.actualDate) < moment(b.actualDate)) {
                    return 1;
                } else if (moment(a.actualDate) > moment(b.actualDate)) {
                    return -1;
                }
            }
            else {
                if (moment(a.actualDate) === moment(b.actualDate)) {
                    return (moment(b.time) - moment(a.time));
                } else if (moment(a.actualDate) > moment(b.actualDate)) {
                    return 1;
                } else if (moment(a.actualDate) < moment(b.actualDate)) {
                    return -1;
                }
            }
        });

出于某种原因，在按effectiveDate升序或降序对数据进行排序time会正确排序time 。 但是当按actualDate排序数据时，也会按升序或降序排序， time数据不正确。

任何帮助将不胜感激。

Answer 1

代替

return (moment(b.time) - moment(a.time));

采用：

moment(a.time, "HH:mm") - moment(b.time, "HH:mm")

你需要告诉moment.js输入字符串是“时间”字符串。

Answer 2

三个问题：

1. 使用===比较两个moment s将不起作用; 他们永远不会平等。 Moment提供了一个.isSame函数来执行此操作。
2. 要解析时间，您需要提供格式字符串，在本例中为"HH:mm" 。
3. 减去两次需要在升序和降序之间反转。 只需翻转订单。

请参阅下面的工作版本，其中包含指示更改的注释：

function sorted(desc) {
    return effectiveDates.sort(function (a, b) {
        if (desc) {
            // Use .isSame to compare two moments:
            if (moment(a.actualDate).isSame(moment(b.actualDate))) {
                // Provide a format to moment so it knows how to parse the times:
                return moment(b.time, "HH:mm") - moment(a.time, "HH:mm");
            } else if (moment(a.actualDate) < moment(b.actualDate)) {
                return 1;
            } else if (moment(a.actualDate) > moment(b.actualDate)) {
                return -1;
            }
        }
        else {
            if (moment(a.actualDate).isSame(moment(b.actualDate))) {
                // Reverse the order of the subtraction when sorting ascending:
                return moment(a.time, "HH:mm") - moment(b.time, "HH:mm");
            } else if (moment(a.actualDate) > moment(b.actualDate)) {
                return 1;
            } else if (moment(a.actualDate) < moment(b.actualDate)) {
                return -1;
            }
        }
    });
}

---

输出这些电话，

console.log("DESCENDING:");
console.log(sorted(true));

console.log("ASCENDING:");
console.log(sorted(false));

是：

DESCENDING:
[ { actualDate: '2017-08-29',
    effectiveDate: '2017-01-01',
    time: '13:22' },
  { actualDate: '2017-08-29',
    effectiveDate: '2017-01-01',
    time: '11:33' },
  { actualDate: '2017-08-29',
    effectiveDate: '2017-01-01',
    time: '10:57' },
  { actualDate: '2016-06-17',
    effectiveDate: '2016-01-01',
    time: '10:26' },
  { actualDate: '2016-06-17',
    effectiveDate: '2016-01-01',
    time: '10:03' },
  { actualDate: '2015-12-03',
    effectiveDate: '2015-01-01',
    time: '16:54' },
  { actualDate: '2014-07-07',
    effectiveDate: '2014-05-01',
    time: '10:47' },
  { actualDate: '2014-07-07',
    effectiveDate: '2014-05-01',
    time: '10:41' },
  { actualDate: '2014-07-07',
    effectiveDate: '2014-01-01',
    time: '10:36' },
  { actualDate: '2014-07-07',
    effectiveDate: '2014-01-01',
    time: '10:36' } ]
ASCENDING:
[ { actualDate: '2014-07-07',
    effectiveDate: '2014-01-01',
    time: '10:36' },
  { actualDate: '2014-07-07',
    effectiveDate: '2014-01-01',
    time: '10:36' },
  { actualDate: '2014-07-07',
    effectiveDate: '2014-05-01',
    time: '10:41' },
  { actualDate: '2014-07-07',
    effectiveDate: '2014-05-01',
    time: '10:47' },
  { actualDate: '2015-12-03',
    effectiveDate: '2015-01-01',
    time: '16:54' },
  { actualDate: '2016-06-17',
    effectiveDate: '2016-01-01',
    time: '10:03' },
  { actualDate: '2016-06-17',
    effectiveDate: '2016-01-01',
    time: '10:26' },
  { actualDate: '2017-08-29',
    effectiveDate: '2017-01-01',
    time: '10:57' },
  { actualDate: '2017-08-29',
    effectiveDate: '2017-01-01',
    time: '11:33' },
  { actualDate: '2017-08-29',
    effectiveDate: '2017-01-01',
    time: '13:22' } ]

UPDATE

更简单的比较器功能：

function sorted(desc) {
    return effectiveDates.sort(function (a, b) {
        // Combine the date and time and parse them together.
        var ret = moment(a.actualDate + " " + a.time) - moment(b.actualDate + " " + b.time);

        // Flip the sign if we're sorting descending.
        if (desc) {
            ret *= -1;
        }

        return ret;
    });
}