Get array of a specific field from a JSON Array

Question

So I got a JSON array like this one:

"robots": [
    {
        "id": 1,
        "name": "foo",
        "last_connection": "2017-03-18 14:25:36"
    },{
        "id": 3,
        "name": "bar",
        "last_connection": "2017-03-19 17:28:39"
    },{
        "id": 8,
        "name": "foobar",
        "last_connection": "2017-04-18 11:22:33"
    }
]

Is there is simple way to get an array of ids from all my robots without doing a for loop over my array?

ids = [1, 3, 8]

`Array.map()` will do the job, just try – RomanPerekhrest May 16 '17 at 08:06 — RomanPerekhrest, May 16 '17 at 08:06

score 11 · Accepted Answer · answered May 16 '17 at 08:07

11

Yes, using the Array.map method.

const ids = robots.map(robot => robot.id);

ids will now be [1, 3, 8].

answered May 16 '17 at 08:07

Aron

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Please do not answer this basic questions. There is a very high chance they have been answered before. Search such links and share their url and mark them as duplicate – Rajesh May 16 '17 at 08:07
1

What's wrong with answering a basic question if it's literally a one-liner? – Aron May 16 '17 at 08:08
Whats wrong is you are duplicating content. Old posts have different methods to achieve output, have discussions in comment and more importantly explanations which your answer is missing. – Rajesh May 16 '17 at 08:10

Get array of a specific field from a JSON Array

1 Answers1