Lodash 内容分组处理

对这样的数据

[
        {
            "date": "2018",
            "modified": 1516884840670,
            "content": null
        },
        {
            "date": "2016",
            "modified": 1516884600059,
            "content": null
        },
        {
            "date": "2016",
            "modified": 1516884359841,
            "content": null
        }, ...]

分组成

[{
    year: "2018",
    likes: [{
              "date": "2018",
            "modified": 1516884840670,
            "content": null
   }, {...}]]

使用 Lodash 可以这样操作

      let groupedItems = _(list)
        .groupBy(item => item.date)
        .map((items, year) => {
          return {
            year: year,
            likes: items
          }
        })
        .reverse() // 为了反转数组排序
        .value()