Check if object is in the array?

Question

var obj = [{ username: 'kim'}, { username: 'ryan'} ];

I want to create an if statement where if theres a 'kim' value on the var obj, it returns true;

Answer 1

You can check with the array util function find() if there is such an element in the array. Here is an example:

const objs = [{ username: 'kim'}, { username: 'ryan'}];
const result = objs.find(item => item.username === 'kim');
if (typeof result !== 'undefined') {
  console.log(true);
} else {
  console.log(false);
}

Answer 2

You can use Array.find or Array.some.

• find

obj.find((el) => el.username == 'kim')

• some

obj.some((el) => el.username == 'kim') != undefined

• Or even `Array.reduce

  obj.reduce((rs, el) => el.username == 'kim' || rs, false)