Sort JSON based on custom sort order array

Question

I want to sort the below json response based on an array.

{
    "expanded": {
        "developer": {
            "numFound": 1,
            "start": 0,
            "maxScore": 0.13050619,
            "docs": [
                {
                    "title": "developer"
                }
            ]
        },
        "shop": {
            "numFound": 1,
            "start": 0,
            "maxScore": 1.1272022,
            "docs": [
                {
                    "title": "shop"
                }
            ]
        },
        "support": {
            "numFound": 84,
            "start": 0,
            "maxScore": 1.3669837,
            "docs": [
                {
                    "title": "support"
                }
            ]
        }
    }
}

I want to sort based on the below sort array (in same order as below).

[ 'shop', 'support', 'developer']

Is there a way to sort this json based on some custom value?

Filter them to an array, then sorting?

Tân
– Tân

2017-02-28 23:45:56 +00:00
Commented Feb 28, 2017 at 23:45 — Tân
– Tân, Commented Feb 28, 2017 at 23:45

baao · Accepted Answer · 2017-03-01 09:40:46Z

3

You can't sort json, but you can create an array of objects and sort that:

let foo = {"expanded": {"developer": {"numFound": 1,"start": 0,"maxScore": 0.13050619,"docs": [{"title": "developer"}]},"shop": {"numFound": 1,"start": 0,"maxScore": 1.1272022,"docs": [{"title": "shop"}]},"support": {"numFound": 84,"start": 0,"maxScore": 1.3669837,"docs": [{"title": "support"}]}}};

let orderArr = ['shop', 'support', 'developer'];

let res = Object.keys(foo.expanded)
    .map(a => ({[a] : foo.expanded[a]}))
    .sort((a,b) => (orderArr.indexOf(Object.keys(a)[0]) + 1) - (orderArr.indexOf(Object.keys(b)[0]) + 1));

console.log(res);

edited Mar 1, 2017 at 9:40

answered Feb 28, 2017 at 23:48

baao

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Comments

DRD · Accepted Answer · 2017-03-01 00:22:31Z

2

It seems that there is no need to sort since the order for the properties is explicitly defined. Instead, just place the required objects into an array:

let ordered = ['shop', 'support', 'developer'].map(property => {
  return {[property]: foo.expanded[property]};
});

answered Mar 1, 2017 at 0:22

DRD

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