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javascript - 在 Javascript 中过滤日期

问题描述

我正在尝试过滤包含大于特定日期的日期（从字符串转换）的数组。

_this.downloadData.forEach(_d => _d.LogTime = _d.LogTime.toString());

console.log(_this.downloadData.filter(x=>new Date(x.LogTime) > new Date('3/11/2019 7:29:12 AM')));

但是过滤器总是返回零个项目

.

数组如下所示：

[0 … 99]
0:
CPUStat:""
Connectivity:""
DiskStatus:""
HostName:"HOSTname"
LastRebootStatus:null
LogTime:"Mon Mar 11 2019 07:39:12 GMT+0530 (India Standard Time)"

__proto__:
Object

标签： javascriptjquerystringtypescriptdate

解决方案

Most of your problem here consist of the date time format not being ISO 8601 compliant. Because of this you need to clean up the date. LogTime.substring(4,23) + obj.LogTime.substring(28,33) will get the important parts from your string. Then you can use moment.js (https://momentjs.com), which is a must for handling time in JavaScript.

You can run the code below and see that it works

// Your example time array
let timeArray = [
  { LogTime:"Mon Mar 11 2019 07:39:12 GMT+0530 (India Standard Time)" },
  { LogTime:"Mon Mar 11 2019 08:39:12 GMT+0530 (India Standard Time)" },
  { LogTime:"Mon Mar 11 2019 09:39:12 GMT+0530 (India Standard Time)" },
  { LogTime:"Mon Mar 11 2019 10:39:12 GMT+0530 (India Standard Time)" }
 ],
 format = "MMM MM YYYY HH:mm:ssZ",
    shouldBeAfter = moment('Mar 11 2019 09:00:12+0530', format),
    result,
    filterDateGreaterThan = function (obj){
      let sDate,
          mDate;
      
      sDate = obj.LogTime.substring(4,23) + obj.LogTime.substring(28,33);
      mDate = moment(sDate, format);
      // console.log(mDate);
      return mDate.isAfter(shouldBeAfter);
    };
 result = timeArray.filter(filterDateGreaterThan);
 console.log(result);
<script src="https://momentjs.com/downloads/moment.min.js"></script>

Code when not using Moment.js

// Your example time array
let timeArray = [
  { LogTime:"Mon Mar 11 2019 07:39:12 GMT+0530 (India Standard Time)" },
  { LogTime:"Mon Mar 11 2019 08:39:12 GMT+0530 (India Standard Time)" },
  { LogTime:"Mon Mar 11 2019 09:39:12 GMT+0530 (India Standard Time)" },
  { LogTime:"Mon Mar 11 2019 10:39:12 GMT+0530 (India Standard Time)" }
 ],
    shouldBeAfter = new Date('Mar 11 2019 09:00:12+0530'),
    result,
    filterDateGreaterThan = function (obj){
      let sDate,
          date;
      
      sDate = obj.LogTime.substring(4,23) + obj.LogTime.substring(28,33);
      date = new Date(sDate);
      return date.valueOf() > shouldBeAfter.valueOf();
    };
 result = timeArray.filter(filterDateGreaterThan);
 console.log(result);

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