Remove Differences from 2 Arrays

arrayCheck.js

const array1 = [1, 2, 3, 4, 5];
const array2 = [1];

// Return all but similariy.
array1.filter( item => array2.every( item2 => item2.id !== item.id ) ); // Returns [2, 3, 4, 5]

// Return similarity.
array1.filter( item => array2.every( item2 => item2.id === item.id ) ); // Returns [1]