A for-loop that compares two arrays looking for matching values

Question

I have two arrays that I need to check against each other and if they have reached a point where both items in each array are actually the same as one another, then append s

Answer 1

Hi using lodash or underscore you can easily intersection two array.

_.intersection([2, 1], [2, 3]);

Result is [2].

Lodash document: https://lodash.com/docs/4.17.2#intersection