Sort array of objects by single key with date value

arrays, javascript, object

Solution

You can use `Array.sort`.

Here's an example:

var arr = [{
    "updated_at": "2012-01-01T06:25:24Z",
    "foo": "bar"
  },
  {
    "updated_at": "2012-01-09T11:25:13Z",
    "foo": "bar"
  },
  {
    "updated_at": "2012-01-05T04:13:24Z",
    "foo": "bar"
  }
]

arr.sort(function(a, b) {
  var keyA = new Date(a.updated_at),
    keyB = new Date(b.updated_at);
  // Compare the 2 dates
  if (keyA < keyB) return -1;
  if (keyA > keyB) return 1;
  return 0;
});

console.log(arr);

Problem

I have an array of objects with several key value pairs, and I need to sort them based on 'updated_at': ``` [ { "updated_at" : "2012-01-01T06:25:24Z", "foo" : "bar" }, { "updated_at" : "2012-01-09T11:25:13Z", "foo" : "bar" }, { "updated_at" : "2012-01-05T04:13:24Z", "foo" : "bar" } ] ``` What's the most efficient way to do so?

Original source

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