Question

我有一个我想要排序的以下类型的数组。我想按状态对它们进行排序并首先显示错误的，然后按日期对它们进行排序。我不知道我是否应该使用 group by then sort。

    "itemlist": [{
"Status":false,"Date":"2021-07-23T07:43:01.377Z","Title":"test4"},{
"Status":false,"Date":"2021-07-23T07:28:23.841Z","Title":"test3"},{
"Status":false,"Date":"2021-07-23T07:03:12.736Z","Title":"test2"},{
"Status":false,"Date":"2021-07-23T07:02:01.901Z","Title":"test1"},{
"Status":false,"Date":"2021-07-23T06:46:34.614Z","Title":"test1"},{
"Status":false,"Date":"2021-07-22T14:33:41.351Z","Title":"test0"},{
"Status":true,"Date":"2021-07-16T06:28:41.568Z","Title":"Test"}]

我使用了下面的代码，它按状态对数组进行排序，但日期排序不起作用。有人可以用更好的方法帮助我吗，我做错了什么？ , 谢谢

var res=itemlist.sort((a, b) => (a.Status === b.Status ) ? 0 : a.Status ? 1 : -1 || b.Date- a.Date);

Answer 1

原因是你的日期是字符串格式，不是实际日期，比较时需要改成日期

var res=itemlist.sort(
   (a, b) => (a.Status === b.Status ) ? 
      0 : a.Status ? 1 : -1 || new Date(b.Date)- new Date(a.Date));

另外，你的表达式太复杂，无法阅读和调试，最好使用()来包装它或使用if else条件

 var res=itemlist.sort(
   (a, b) => (a.Status === b.Status ) ? 
      0 : (a.Status ? 1 : -1 || new Date(b.Date)- new Date(a.Date)));

工作代码

   var itemlist = [{
"Status":false,"Date":"2021-07-23T07:43:01.377Z","Title":"test4"},{
"Status":false,"Date":"2021-07-23T07:28:23.841Z","Title":"test3"},{
"Status":false,"Date":"2021-07-23T07:03:12.736Z","Title":"test2"},{
"Status":false,"Date":"2021-07-23T07:02:01.901Z","Title":"test1"},{
"Status":false,"Date":"2021-07-23T06:46:34.614Z","Title":"test1"},{
"Status":false,"Date":"2021-07-22T14:33:41.351Z","Title":"test0"},{
"Status":true,"Date":"2021-07-16T06:28:41.568Z","Title":"Test"}];
 var res=itemlist.sort(
   (a, b) => (a.Status === b.Status ) ? 
      0 : (a.Status ? 1 : -1 || new Date(b.Date)- new Date(a.Date)));

//output the sorted result
console.log(res);

按状态排序，然后按日期 JavaScript

1 个答案: