Using .filter to compare two arrays and return values that aren't matched

Question

I\'m having some issues comparing the elements of two arrays and filtering out matching values. I only want to return array elements that are NOT included within wordsToRe

Answer 1

forEach on fullWordList is not required, use filter on fullWordList and indexOf() in your function in filter() to check if a number exists in wordsToRemove or not.

var fullWordList = ['1','2','3','4','5'];
var wordsToRemove = ['1','2','3'];

var newList = fullWordList.filter(function(x){
   return wordsToRemove.indexOf(x) < 0;
})
console.log(newList);