Get elements unique to each of the two arrays

Given two numeric arrays arrA and arrB. You need to return an array result, consisting of two nested arrays:

result[0] – numbers from arrA that are not in arrB; result[1] – numbers from arrB that are not in arrA.

Examples: Input: arrA = [1,2,3], arrB = [2,4,6] Output: [[1,3],[4,6]]

Input: arrA = [1,2,3,3], arrB = [1,1,2,2] Output: [[3], []]