How to understand Ruby's .each and .map

Question

I am having trouble understanding the differences between map and each, and where and when to use them.

I read \"What does map do?\" and \

Answer 1

The difference is that each is performing an action on each element in the array, returning the original array. The action performed possibly mutated the element.

Whereas map is performing an action on each element in the array and returning its result as an array.