從數組中獲取具有date屬性中最新值的對象？

Question

我想從date屬性中具有最新/最大值的數組中獲取對象。 有沒有很好的方法可以做到這一點？

[
  {
    "Address": 25,
    "AlertType": 1,
    "Area": "North",
    "Date": "2019-02-01T00:01:01.001Z",
    "Value": -1
  },
  {
    "Address": 26,
    "AlertType": 1,
    "Area": "West",
    "Date": "2016-04-12T15:13:11.733Z",
    "Value": -1
  },
  {
    "Address": 25,
    "AlertType": 1,
    "Area": "North",
    "Date": "2017-02-01T00:01:01.001Z",
    "Value": -1
  }
          .
          .
          .
]

Answer 1

使用Reduce（O（n））：

 var data = [{ "Address": 25, "AlertType": 1, "Area": "North", "Date": "2019-02-01T00:01:01.001Z", "Value": -1 }, { "Address": 26, "AlertType": 1, "Area": "West", "Date": "2016-04-12T15:13:11.733Z", "Value": -1 }, { "Address": 25, "AlertType": 1, "Area": "North", "Date": "2017-02-01T00:01:01.001Z", "Value": -1 }] console.log( data.reduce((a,b)=>new Date(a.Date).getTime() > new Date(b.Date).getTime()? a : b, {}) ) 

---

排序（O（n log n））：

 var data = [{ "Address": 25, "AlertType": 1, "Area": "North", "Date": "2019-02-01T00:01:01.001Z", "Value": -1 }, { "Address": 26, "AlertType": 1, "Area": "West", "Date": "2016-04-12T15:13:11.733Z", "Value": -1 }, { "Address": 25, "AlertType": 1, "Area": "North", "Date": "2017-02-01T00:01:01.001Z", "Value": -1 }] console.log( data.sort((a,b)=>new Date(b.Date).getTime() - new Date(a.Date).getTime())[0] )