How to match key value in array of objects

Question

I have array of objects. I want to find the value in key which matches the word and if it's there it should return me true in console otherwise false.

I have array of objects like this:

[
    {
        "groupName": "harry",
    },
    {
        "groupName": "mike",
    }
]

And I want to match this key groupName with value like Amy. As we can see Amy in not there in groupName so it should return me false in console otherwise true if any of the groupName value is Amy.

How to achieve this using Javascript?

If you want it in the console, what do you want react to do? — Charlie Bamford
– Charlie Bamford, Commented May 10, 2021 at 19:17
If it returning true then I have to use useState to fire up a action. Otherwise if it is false then I would show alert in that. I just need the concept of matching it with the given word. That's it. Otherwise it would be lengthy question and answer to be asked. — progpro
– progpro, Commented May 10, 2021 at 19:20
Does this answer your question? How to determine if Javascript array contains an object with an attribute that equals a given value? — Henry Ecker
– Henry Ecker ♦, Commented May 10, 2021 at 19:20

T J · Accepted Answer · 2021-05-10 19:23:21Z

3

You can simply use Array.some():

const data = [{
    "groupName": "harry",
  },
  {
    "groupName": "mike",
  }
];

const result = data.some(obj => obj.groupName === 'harry');
console.log(result);

Or Array.find() to get the matching object:

const data = [{
    "groupName": "harry",
  },
  {
    "groupName": "mike",
  }
];

const result = data.find(obj => obj.groupName === 'harry');
console.log(result);

answered May 10, 2021 at 19:23

T J

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Comments

Guerric P · Accepted Answer · 2021-05-10 19:20:18Z

1

You could use this code (functional code style):

const input = [
    {
        "groupName": "harry",
    },
    {
        "groupName": "mike",
    }
];

const findByPropertyName = name => arr => searched => arr.some(({ [name]: value}) => value === searched);

const findByGroupName = findByPropertyName('groupName');

const notFound = findByGroupName(input)('Amy');
const found = findByGroupName(input)('harry');

console.log(notFound);
console.log(found);

answered May 10, 2021 at 19:20

Guerric P

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3 Comments

fortunee Over a year ago

This answer wild yo! :)

fortunee Over a year ago

I'd rather do arr.some((x) => x[name] === searched); instead of arr.some(({ [name]: value}) => value === searched); it just adds some unnecessary complexity

Guerric P Over a year ago

Yeah you're right, I just like the idea of giving a name to what I compare

fortunee · Accepted Answer · 2021-05-10 19:24:35Z

1

React has nothing to do with what you're trying to achieve.

With just Javascript, you can do this using the some Array method like this.

const obj = [
    {
        "groupName": "harry",
    },
    {
        "groupName": "mike",
    }
]

const hasAmy = obj.some(x => x.groupName === 'Amy');
const hasMike = obj.some(x => x.groupName === 'mike');

console.log(hasAmy);
console.log(hasMike);

answered May 10, 2021 at 19:24

fortunee

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