javascript - Lodash _.sortBy基于创建的日期和时间

let notesInfo = []

if (_.isArray(result)) {
  console.log(result, '-----------');
  notesInfo = _.sortBy(result, ['modifiedDate']);
} else {
  notesInfo = result;
}

console.log(notesInfo)

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.15/lodash.js"></script>

我正在使用此代码根据创建的日期和时间显示注释。最新添加的注释应使用lodash的sortBy方法放在最前面。如何实现呢？提前致谢。

最佳答案

如果要先获取最新的项目，而其余的则按升序排列，则可以按升序正常排序。由于最后一个元素是最新元素，因此可以使用Array#pop和Array#unshift将其旋转到数组的前面：

let result = [
  { modifiedDate: "2019-02-01", name: "february" },
  { modifiedDate: "2019-04-01", name: "april" },
  { modifiedDate: "2019-01-01", name: "january" },
  { modifiedDate: "2019-03-01", name: "march" }
];

//sort ascending
let notesInfo = _.sortBy(result, ['modifiedDate']);

//take the most recent (last)
var lastElement = notesInfo.pop();

//place it first
notesInfo.unshift(lastElement);

console.log(notesInfo);

<script src="https://cdn.jsdelivr.net/npm/[email protected]/lodash.min.js"></script>

如果要按降序排列项目，则应使用_.orderBy而不是_.sortBy：

let result = [
  { modifiedDate: "2019-02-01", name: "february" },
  { modifiedDate: "2019-04-01", name: "april" },
  { modifiedDate: "2019-01-01", name: "january" },
  { modifiedDate: "2019-03-01", name: "march" }
];

//sort descending
let notesInfo = _.orderBy(result, ['modifiedDate'], ['desc']);

console.log(notesInfo);

<script src="https://cdn.jsdelivr.net/npm/[email protected]/lodash.min.js"></script>

关于javascript - Lodash _.sortBy基于创建的日期和时间，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/58318458/