数组列表按布尔值排序，然后按日期排序javascript/typescript

gk7wooem 于 2021-09-13 发布在 Java

关注(0)|答案(3)|浏览(406)

我正在动态地向列表中添加新项目，并根据状态先排序，然后按日期排序。工作代码
每当我向列表中添加一个新项目时，我希望列表显示错误的状态项，其中最新的日期首先按desc显示，然后按date desc显示真值项

added item ={"Status":false,"Date":"2021-07-23T07:43:01.377Z","Title":"test6"}

无序列表：-

var itemlist = [{
"Status":true,"Date":"2021-07-23T07:28:23.841Z","Title":"test5"},{
"Status":false,"Date":"2021-07-23T07:03:12.736Z","Title":"test4"},{
"Status":false,"Date":"2021-07-23T07:02:01.901Z","Title":"test3"},{
"Status":true,"Date":"2021-07-23T06:46:34.614Z","Title":"test2"},{
"Status":false,"Date":"2021-07-22T14:33:41.351Z","Title":"test1"},{
"Status":true,"Date":"2021-07-16T06:28:41.568Z","Title":"Test0"}];

预期结果：-

var itemlist = [{
    "Status":false,"Date":"2021-07-23T07:43:01.377Z","Title":"test6"},{
    "Status":false,"Date":"2021-07-23T07:03:12.736Z","Title":"test4"},{
    "Status":false,"Date":"2021-07-23T07:02:01.901Z","Title":"test3"},{
    "Status":false,"Date":"2021-07-22T14:33:41.351Z","Title":"test1"},{
    "Status":true,"Date":"2021-07-23T07:28:23.841Z","Title":"test5"},{
    "Status":true,"Date":"2021-07-23T06:46:34.614Z","Title":"test2"},{
    "Status":true,"Date":"2021-07-16T06:28:41.568Z","Title":"Test0"}];

获得的结果：-

var itemlist = [{
    "Status":false,"Date":"2021-07-23T07:03:12.736Z","Title":"test4"},{
    "Status":false,"Date":"2021-07-23T07:02:01.901Z","Title":"test3"},{
    "Status":false,"Date":"2021-07-22T14:33:41.351Z","Title":"test1"},{
    "Status":false,"Date":"2021-07-23T07:43:01.377Z","Title":"test6"},{
    "Status":true,"Date":"2021-07-23T07:28:23.841Z","Title":"test5"},{
    "Status":true,"Date":"2021-07-23T06:46:34.614Z","Title":"test2"},{
    "Status":true,"Date":"2021-07-16T06:28:41.568Z","Title":"Test0"}];

使用的方法：-

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

Arrays jquery JavaScript sorting typescript

来源：https://stackoverflow.com/questions/68504588/array-list-sort-by-boolean-then-by-date-javascript-typescript

3条答案

按热度按时间

fhg3lkii1#

你可以分类 Status 随着值增量的增加 Date 随着字符串的下降。

var itemlist = [{ Status: true, Date: "2021-07-23T07:28:23.841Z", Title: "test5" }, { Status: false, Date: "2021-07-23T07:03:12.736Z", Title: "test4" }, { Status: false, Date: "2021-07-23T07:02:01.901Z", Title: "test3" }, { Status: true, Date: "2021-07-23T06:46:34.614Z", Title: "test2" }, { Status: false, Date: "2021-07-22T14:33:41.351Z", Title: "test1" }, { Status: true, Date: "2021-07-16T06:28:41.568Z", Title: "Test0" }, { Status: false, Date: "2021-07-23T07:43:01.377Z", Title: "test6" }];

itemlist.sort((a, b) => a.Status - b.Status || b.Date.localeCompare(a.Date));

console.log(itemlist);

.as-console-wrapper { max-height: 100% !important; top: 0; }

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jvidinwx2#

您可以在中使用逻辑or运算符 sort 回拨。

var itemlist = [{
"Status":true,"Date":"2021-07-23T07:28:23.841Z","Title":"test5"},{
"Status":false,"Date":"2021-07-23T07:03:12.736Z","Title":"test4"},{
"Status":false,"Date":"2021-07-23T07:02:01.901Z","Title":"test3"},{
"Status":true,"Date":"2021-07-23T06:46:34.614Z","Title":"test2"},{
"Status":false,"Date":"2021-07-22T14:33:41.351Z","Title":"test1"},{
"Status":true,"Date":"2021-07-16T06:28:41.568Z","Title":"Test0"}];
itemlist.sort((a,b) => a.Status - b.Status || new Date(b.Date) - new Date(a.Date))
console.log(itemlist);

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bcs8qyzn3#

首先 Unordered list:- 及 Expected Result:- 示例数据中的元素数不相同。当您请求帮助时，请尝试正确获取示例数据。
解决方案：

var compareFn = (a, b) => {
    if (a.Status !== b.Status) {
        return a.Status ? 1 : -1;
    } else {
        return new Date(b.Date) < new Date(a.Date) ? -1 : 1;
    }
}

var res=itemlist.sort(compareFn);

说明：
如果 .Status 不匹配我们希望元素先为false，否则如果 .Status 匹配我们想要比较日期。

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数组列表按布尔值排序，然后按日期排序javascript/typescript

3条答案

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