Lodash sort list of objects based on key

Question

I am looking for sorting the list of objects based on key

Here is my object

var Categories =    {

      "social": [
        {
          "id": "social_001",
          "lastModified": "2 Day ago"
        }
      ],
"communication": [
        {
          "id": "communication_001",
          "lastModified": "4 Day ago"
        },
        {
          "id": "communication_002",
          "lastModified": "1 Day ago"
        }
      ],
      "storage": [
        {
          "id": "storage_001",
          "lastModified": "3 Day ago"
        }
      ]
    }

so in output sorted object will sort as start with communication, social , storage suggest me some help.

from the linked Question: 'JavaScript objects are not ordered. It is meaningless to try to "sort" them. ' — Martin Schneider
– Martin Schneider, Commented Mar 16, 2017 at 7:05
@MartinSchneider That's been changed in ES2015. String keys will iterate in creation order. — Matt
– Matt, Commented Mar 16, 2017 at 7:58
i stand corrected: in es2015 the keys will iterate in creation order, @Matt is right. — Martin Schneider
– Martin Schneider, Commented Mar 16, 2017 at 8:44

Martin Schneider · Accepted Answer · 2017-03-16 08:48:45Z

15

Here is a solution using lodash:

var Categories = {
  "social": [
    {
      "id": "social_001",
      "lastModified": "2 Day ago"
    }
  ],
  "communication": [
    {
      "id": "communication_001",
      "lastModified": "4 Day ago"
    },
    {
      "id": "communication_002",
      "lastModified": "1 Day ago"
    }
  ],
  "storage": [
    {
      "id": "storage_001",
      "lastModified": "3 Day ago"
    }
  ]
}

var ordered = {};   
_(Categories).keys().sort().each(function (key) {
  ordered[key] = Categories[key];
});

Categories = ordered;

answered Mar 16, 2017 at 8:48

Martin Schneider

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1 Comment

Matt Over a year ago

lodash actually ends up not much different to the native code for this Object.keys(Categories).sort().forEach(key => o[key] = Categories[key]). Even if you use .reduce both are still the same!

Matt Riley · Accepted Answer · 2023-12-15 02:26:00Z

6

Here's a one-liner using lodash:

_.pick(obj, Object.keys(obj).sort());

pick will return a new object with the keys in the order specified by the second argument.

answered Dec 15, 2023 at 2:26

Matt Riley

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1 Comment

danday74 Over a year ago

awesome deserves more upvotes

Paul Roub · Accepted Answer · 2017-06-22 15:55:37Z

3

Get the key array from your object using lodash _.keys or Object.keys and sort that array using JavaScript's sort() or sort().reverse() for ascending or descending order.

Then use this array for picking up each object by yourObject[array[0]].

edited Jun 22, 2017 at 15:55

Paul Roub

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answered Jun 22, 2017 at 15:50

yureka

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