Write zip: a function that iterates over two arrays/iterables at the same time.
zip([1, 2], [3, 4]) --> [[1, 3], [2, 4]]
Consider corner cases. Handle more than two arrays if possible. input/output format is up to you.
If you need, check docs on the zip functions in, say, lodash or python or Haskell for the desired behavior.
You choose (and ideally justify the design decision). One option: in python, it stops on the shortest and another function zip_longest does the opposite.