How can we retrieve the object from an array that has the most recent value in its date

Is there an efficient way to retrieve the object from an array with the latest or largest value in the date property?

[
  {
    "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
  }
          .
          .
          .
]
javascriptarrays

Answer №1

Utilizing Reduce for Efficiency:

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, {})
)

Implementing Sorting for Performance:

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]
)

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