How to check if a certain value exist in an array which holds objects as its elements. JavaScript

Question

The first one is when we have an array holds regular elements like strings and I know how to use Includes on it.

But how about arrays holding objects as their element? How can I check if there is a certain value in those objects?

const arr = ['this', 'is', 'a test'];

console.log(arr.includes('this'));

const arr2 = [
  { id: '123', name: 'Alex' },
  { id: '345', name: 'Dan' },
  { id: '33', name: 'Joe' },
];

What is the use-case? What is the input? What property (a specific one, any) should be checked? What is the expected output? -> How do I ask a good question? — Andreas
– Andreas, Commented Feb 16, 2022 at 14:37

Reut Schremer · Accepted Answer · 2022-02-16 14:36:51Z

1

You can use the some function.

const arr2 = [
  { id: '123', name: 'Alex' },
  { id: '345', name: 'Dan' },
  { id: '33', name: 'Joe' },
];

console.log(arr2.some(item => item.name==="this" ))

The some() method tests whether at least one element in the array passes the test implemented by the provided function.

answered Feb 16, 2022 at 14:36

Reut Schremer

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Hen Moshe · Accepted Answer · 2022-02-16 14:51:57Z

1

if you want a returned array of values that match = >

 const filtered = arr2.filter((item)=>item.name == 'value')

if you want bool(true||false) =>

 const filtered = arr2.filter((item)=>item.name == 'value').length > 0

or using some as mentioned above.

answered Feb 16, 2022 at 14:51

Hen Moshe

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