JAVASCRIPT

javascript object includes

const person = {
  first_name: "Sam",
  last_name: "Bradley"
};

Object.values(person).includes("Bradley");

array contains object in javascript

array.findIndex((obj) => obj.id === obj.id) !== -1

javascript object array contains

if (vendors.findIndex(item => item.Name == "Magenic") == -1) {
  //not found item
} else {
  //found item 
}

js does object contain value

// You can turn the values of an Object into an array.
// Then test that a value is present:

// This assumes, that the Object is not nested
// and the value is an exact match:

var obj = { a: 'test1', b: 'test2' };

// Note that an array can only have positive index's; so
// checking for a negative index is a super valid way for getting a
// boolean value as a result for the check.
if (Object.values(obj).indexOf('test1') > -1) {
   console.log('Value exists!');
}

javascript includes check object

let hasMagenicVendor = vendors.some( vendor => vendor['Name'] === 'Magenic' )

Check if an array contains a object in javascript

const john = {
    'name': 'John Doe',
    'email': 'john.doe@example.com'
};
const jane = {
    'name': 'Jane Doe',
    'email': 'jane.doe@example.com'
};

const list = [john, jane];
let result = list.includes(john);

console.log(result); // true

Check if an array contains a object in javascript

const list = [{
    'name': 'John Doe',
    'email': 'john.doe@example.com'
}, {
    'name': 'Jane Doe',
    'email': 'jane.doe@example.com'
}];

const isEqual = (first, second) => {
    return JSON.stringify(first) === JSON.stringify(second);
}

const result = list.some(e => isEqual(e, {
    'name': 'John Doe',
    'email': 'john.doe@example.com'
}));

console.log(result); // true