Sort Array of object by object field in Angular 6

Question

I am getting an array of "product"s from a resolver getting data from a json endpoint.

ngOnInit() {
  this.products = this._route.snapshot.data.products;
  console.log('products: ', this.products);
}

where one of the objects in this array is in the format

 {
    "id": 3645,
    "date": "2018-07-05T13:13:37",
    "date_gmt": "2018-07-05T13:13:37",
    "guid": {
        "rendered": ""
    },
    "modified": "2018-07-05T13:13:37",
    "modified_gmt": "2018-07-05T13:13:37",
    "slug": "vpwin",
    "status": "publish",
    "type": "matrix",
    "link": "",
    "title": {
        "rendered": "VPWIN"
    },
    "content": {
        "rendered": "",
        "protected": false
    },
    "featured_media": 0,
    "parent": 0,
    "template": "",
    "better_featured_image": null,
    "acf": {
        "domain": "SMB",
        "ds_rating": "3",
        "dt_rating": ""
    },
    ...
},

What I want to do is sort this array by the field title.rendered

In olden times, in AngularJS, I would simply use an orderBy pipe in the template set to this field. Apparently, this is removed in Angular and from doing research it seems the preferred method is to sort the data itself, such as in ngOnInit.

But I can't figure out how to sort products by producs.title.rendered.

You can see this : https://stackoverflow.com/questions/1129216/sort-array-of-objects-by-string-property-value-in-javascript/50600956#50600956 — Harun Or Rashid, Jul 05 '18 at 15:35

amrender singh · Accepted Answer · 2018-07-05T15:28:52.637

You can simply use Arrays.sort()

array.sort((a,b) => a.title.rendered.localeCompare(b.title.rendered));

Working Example :

var array = [{"id":3645,"date":"2018-07-05T13:13:37","date_gmt":"2018-07-05T13:13:37","guid":{"rendered":""},"modified":"2018-07-05T13:13:37","modified_gmt":"2018-07-05T13:13:37","slug":"vpwin","status":"publish","type":"matrix","link":"","title":{"rendered":"VPWIN"},"content":{"rendered":"","protected":false},"featured_media":0,"parent":0,"template":"","better_featured_image":null,"acf":{"domain":"SMB","ds_rating":"3","dt_rating":""},},{"id":3645,"date":"2018-07-05T13:13:37","date_gmt":"2018-07-05T13:13:37","guid":{"rendered":""},"modified":"2018-07-05T13:13:37","modified_gmt":"2018-07-05T13:13:37","slug":"vpwin","status":"publish","type":"matrix","link":"","title":{"rendered":"adfPWIN"},"content":{"rendered":"","protected":false},"featured_media":0,"parent":0,"template":"","better_featured_image":null,"acf":{"domain":"SMB","ds_rating":"3","dt_rating":""}},{"id":3645,"date":"2018-07-05T13:13:37","date_gmt":"2018-07-05T13:13:37","guid":{"rendered":""},"modified":"2018-07-05T13:13:37","modified_gmt":"2018-07-05T13:13:37","slug":"vpwin","status":"publish","type":"matrix","link":"","title":{"rendered":"bbfPWIN"},"content":{"rendered":"","protected":false},"featured_media":0,"parent":0,"template":"","better_featured_image":null,"acf":{"domain":"SMB","ds_rating":"3","dt_rating":""}}];
array.sort((a,b) => a.title.rendered.localeCompare(b.title.rendered));
 
 console.log(array);

What's the `localeCompare` about, and why is it different to Luis' answer? I've never seen it. — Steve, Jul 05 '18 at 15:22
@Steve From Mdn -The localeCompare() method returns a number indicating whether a reference string comes before or after or is the same as the given string in sort order. It is preferable to use localeCompare when you are sorting string values. — amrender singh, Jul 05 '18 at 15:24

score 24 · Answer 2 · answered Jul 05 '18 at 15:24

Try this

products.sort(function (a, b) {
  return a.title.rendered - b.title.rendered;
});

OR

You can import lodash/underscore library, it has many build functions available for manipulating, filtering, sorting the array and all.

Using underscore: (below one is just an example)

import * as _ from 'underscore';
let sortedArray = _.sortBy(array, 'title');

score 5 · Answer 3 · answered Jul 05 '18 at 15:18

5

Not tested but should work

 products.sort((a,b)=>a.title.rendered > b.title.rendered)

answered Jul 05 '18 at 15:18

Luis felipe De jesus Munoz

7,454
2
33
53

Yup. Thanks, I was really confused about the compare a,b when reading about it on MDN. – Steve Jul 05 '18 at 15:21
While this will often work, it is not a consistent compare function - it is not symmetric. – ASDFGerte Jul 05 '18 at 15:31
@ASDFGerte can you elaborate? What's the better way? – Steve Jul 05 '18 at 15:46
@Steve Did you look at the (currently five times upvoted) duplicate suggestion's top answer? Note that, as many suggested already, `localeCompare` exists already, no need to reinvent the wheel. – ASDFGerte Jul 05 '18 at 15:53
1

This will not work: [Sorting in JavaScript: Shouldn't returning a boolean be enough for a comparison function?](https://stackoverflow.com/questions/24080785) – adiga Nov 05 '19 at 10:08

Sort Array of object by object field in Angular 6

3 Answers3

Linked