How to compare arrays?

Question

JavaScript

There are two arrays, let's say A[1,2,3,4,5,6,7,8,9,0] and B[2,1,0,5,4].
How to remove elements from array B from array A?

Answer 1

A.filter(n => !B.includes(n))
or, if you really need to modify the original array:

for (let i = A.length; i--;) {
  if (B.includes(A[i])) {
    A.splice(i, 1);
  }
}