Compare Array

compareArray.js

const arr1 = [1,2,3,4,5,6,7]
const arr2 = [1, 3, 5, 7]

const filter = (el) => !arr2.includes(el)
const filter2 = (el) => arr2.indexOf(el) === -1
const filter3 = (el) => arr2.every(el2 => el2 !== el)
const filter4 = (el) => !arr2.some(el2 => el2 === el)

console.log(arr1.filter(filter))
console.log(arr1.filter(filter2))
console.log(arr1.filter(filter3))
console.log(arr1.filter(filter4))