Javascript array of objects check for key [duplicate]

Question

So my question how can I check this array of objects by "key" for eg I want to check if the key 3892 is there, I have tried with indexOf but no luck, I can't use a loop.

you need to call Object.keys(yourJSONObject) first to get array of key and search in that array developer.mozilla.org/en/docs/Web/JavaScript/Reference/… — Tareq
– Tareq, Commented Apr 9, 2017 at 20:59

Nenad Vracar · Accepted Answer · 2017-04-09 21:01:07Z

8

You can use some() and hasOwnProperty()

var array = [{3892: 'value'}, {1234: 'value'}];

var check = array.some(obj => obj.hasOwnProperty(3892));
console.log(check)

answered Apr 9, 2017 at 21:01

Nenad Vracar

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4 Comments

Uffo Over a year ago

Do you also now how can I get the value based on this? because this returns true which is good but I also need the value

Nenad Vracar Over a year ago

Do you mean value as object?

Uffo Over a year ago

Well let's say in this case for 3892 I need the value.. in this case 'value'

Nenad Vracar Over a year ago

You can return object using find and then check if object is returned and access value jsfiddle.net/Lg0wyt9u/1774

Lyubomir · Accepted Answer · 2017-04-09 21:00:29Z

2

You can chain Object.keys with Array.prototype.includes to achieve that

Object.keys(myObject).includes(myKey);

const myObject = { name: 'Peter' };
const myKey = 'name';

const result = Object.keys(myObject).includes(myKey);

console.log(`Includes key ${myKey}? `,  result);

answered Apr 9, 2017 at 21:00

Lyubomir

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