array-diff.js

// Your goal in this kata is to implement a difference function, which subtracts one list from another and returns the result.

// It should remove all values from list a, which are present in list b keeping their order.

// arrayDiff([1,2],[1]) == [2]
// If a value is present in b, all of its occurrences must be removed from the other:

// arrayDiff([1,2,2,2,3],[2]) == [1,3]

//solution

function arrayDiff(a, b) {
  return a.filter((num) => !b.includes(num));
}