CODEWITHSUNDEEP
javascriptarrays
Lomo
Lomo

Reputation: 89

Find object value in array of objects JavaScript

I want to check if a object value exist in a array of objects with "some".

I only can find that the object hobbys exist in the array with "some"

"users": [
   {
     "type": "User",
     "name": "Sarah",
     "hobbys":
      {
        first: "something1",
        second: "something2"
      }
   }
]

users.some(item => item.hobbys); // true

I want to check if "first" value in "hobbys" exist.

Upvotes: 2

Views: 95

Answers (5)

Badri Chorapalli
Badri Chorapalli

Reputation: 99

function will return true if it has value else false

let jData = {
    "users": [{
        "type": "User",
        "name": "Sarah",
        "hobbys": {
            "first": "something1",
            "second": "something2"
        }
    }]
};

function hasValue(data, obj, key) {
    return data.some(item => item[obj] && item[obj][key]);
}
console.log(hasValue(jData.users, 'hobbys', 'second')) //true
console.log(hasValue(jData.users, 'hobbys', 'first')) // true
console.log(hasValue(jData.users, 'test', 'first'))  //false

Upvotes: 0

Manikandan Velayutham
Manikandan Velayutham

Reputation: 2228

const users = [{
  "type": "User",
  "name": "Sarah",
  "hobbys": {
    first: "somethig1",
    second: "something2"
  }
}];

const hobbyExists = users.some(({ hobbys }) => (typeof hobbys === 'object' && hobbys['first']));
console.log(hobbyExists);

Upvotes: 0

Nikhil Aggarwal
Nikhil Aggarwal

Reputation: 28455

You can try following assuming hobbys will always be an object and first will not have any falsy values.

let users = [{"type": "User","name": "Sarah","hobbys": {"first": "something1","second": "something2"}}];

console.log(users.some(item => item.hobbys && item.hobbys.first)); // true

Upvotes: 1

Kaushik
Kaushik

Reputation: 2090

You can use "key" in obj also to check if a key is part if object. 

const users = [{
  "type": "User",
  "name": "Sarah",
  "hobbys": {
    first: "something1",
    second: "something2"
  }
}];

const userWithFirstHobbyExists = users.some(({ hobbys }) => (
 typeof hobbys === 'object' && ('first' in hobbys )
));
console.log(userWithFirstHobbyExists);

Alternate and fast way to check is 

    const users = [{
      "type": "User",
      "name": "Sarah",
      "hobbys": {
        first: "something1",
        second: "something2"
      }
    }];

    const userWithFirstHobbyExists = users.some(({ hobbys }) => (
     typeof hobbys === 'object' && hobbys['first'] !== undefined
    ));
    console.log(userWithFirstHobbyExists);

Upvotes: 0

CertainPerformance
CertainPerformance

Reputation: 370729

Check if the hobbys is an object and has an own property of first:

const users = [{
  "type": "User",
  "name": "Sarah",
  "hobbys": {
    first: "something1",
    second: "something2"
  }
}];

const userWithFirstHobbyExists = users.some(({ hobbys }) => (
 typeof hobbys === 'object' && hobbys.hasOwnProperty('first')
));
console.log(userWithFirstHobbyExists);

Upvotes: 1

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