如何在javascript中按小时/6小时/天/周/月/年对日期对象进行分组

Question

I Have 10 years of records. so API will return the array I need to group the array based on date time stamp. A user can choose a grouping option as

• hour
• 6 hours(per day)
• day
• week
• month
• year

data example

[{
  "x": "2019-02-05T14:28:45.540Z",
  "y": 0.18809978382007495
}, {
  "x": "2019-02-05T14:28:45.540Z",
  "y": 0.42347719862654404
}, {
  "x": "2019-02-05T14:28:45.540Z",
  "y": 0.365386421616013
}, {
  "x": "2019-02-05T14:28:45.540Z",
  "y": 0.49364744650351033
}, {
  "x": "2019-02-05T14:28:45.540Z",
  "y": 0.31133576985952016
}, {
  "x": "2019-02-05T14:28:45.540Z",
  "y": 0.5509062071104307
}, {
  "x": "2019-02-05T14:28:45.540Z",
  "y": 0.5556739085429424
}, {
  "x": "2019-02-05T14:28:45.540Z",
  "y": 0.6668348570127745
}, {
  "x": "2019-02-05T14:28:45.540Z",
  "y": 0.4908101365372941
}, {
  "x": "2019-02-05T14:28:45.540Z",
  "y": 0.6042127351503115
}, {
  "x": "2019-02-05T14:28:45.540Z",
  "y": 0.3725497529313371
}, {
  "x": "2019-02-05T14:28:45.540Z",
  "y": 0.29687095332790064
}, {
  "x": "2018-02-07T11:19:19.034Z",
  "y": 0
}]

Is there any generic solutions to get grouping by hour/day/week/month/year

Example output what I want.

for hour

{
 "OCT 2th 2012 6AM": [
    "2012-10-02 06:00:00",
    "2012-10-10 06:03:51"
  ],
  "NOV 11th 2012 AM": [
    "2012-11-11 09:07:21",
    "2012-11-10 09:03:51"
  ],
  "OCT 6th 2013 2PM": [
    "2013-10-07 02:07:02"
  ],
}

for every 6 hour

{
 "OCT 6th 2012 first 6 hours": [
    "2012-10-11 06:00:00",
  ],
 "OCT 6th 2012 second 6 hours": [
    "2012-10-10 06:03:51"
  ],
  "NOV 6th 2012 AM": [
    "2012-11-11 09:07:21",
    "2012-111-10 09:03:51"
  ],
  "OCT 6th 2013 2PM": [
    "2013-10-07 02:07:02"
  ],
}

for day

{
 "OCT 2th 2012": [
    "2012-10-2 06:00:00",
  ],
 "OCT 10th  2012": [
    "2012-10-10 06:03:51"
  ],
  "NOV 11th 2012": [
    "2012-11-11 09:07:21",
    "2012-11-10 09:03:51"
  ],
  "OCT 7th 2013": [
    "2013-10-07 02:07:02"
  ],
}

.for week

{
 "OCT 2012 week number": [
    "2012-10-2 06:00:00",
  ],
 "OCT 2012 week number": [
    "2012-10-10 06:03:51"
  ],

}

for month

{
 "OCT 2012 ": [
    "2012-10-2 06:00:00",
  ],
 "NOV 2012": [
    "2012-11-10 06:03:51"
  ],

}

Answer 1

You can do it the following way maybe?

 const data = [{"x":"2019-02-05T14:28:45.540Z","y":0.18809978382007495},{"x":"2019-02-05T14:28:45.540Z","y":0.42347719862654404},{"x":"2019-02-05T14:28:45.540Z","y":0.365386421616013},{"x":"2019-02-05T14:28:45.540Z","y":0.49364744650351033},{"x":"2019-02-05T14:28:45.540Z","y":0.31133576985952016},{"x":"2019-02-05T14:28:45.540Z","y":0.5509062071104307},{"x":"2019-02-05T14:28:45.540Z","y":0.5556739085429424},{"x":"2019-02-05T14:28:45.540Z","y":0.6668348570127745},{"x":"2019-02-05T14:28:45.540Z","y":0.4908101365372941},{"x":"2019-02-05T14:28:45.540Z","y":0.6042127351503115},{"x":"2019-02-05T14:28:45.540Z","y":0.3725497529313371},{"x":"2019-02-05T14:28:45.540Z","y":0.29687095332790064},{"x":"2018-02-07T11:19:19.034Z","y":0}]; const groups = (() => { const byDay = (item) => moment(item.x).format('MMM DD YYYY'), forHour = (item) => byDay(item) + ' ' + moment(item.x).format('hh a'), by6Hour = (item) => { const m = moment(item.x); return byDay(item) + ' ' + ['first', 'second', 'third', 'fourth'][Number(m.format('k')) % 6] + ' 6 hours'; }, forMonth = (item) => moment(item.x).format('MMM YYYY'), forWeek = (item) => forMonth(item) + ' ' + moment(item.x).format('ww'); return { byDay, forHour, by6Hour, forMonth, forWeek, }; })(); const currentGroup = 'forWeek'; console.log(_.groupBy(data, groups[currentGroup]));

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