How to map and remove nil values in Ruby

Question

I have a map which either changes a value or sets it to nil. I then want to remove the nil entries from the list. The list doesn\'t need to be kept.

Thi

Answer 1

Definitely compact is the best approach for solving this task. However, we can achieve the same result just with a simple subtraction:

[1, nil, 3, nil, nil] - [nil]
 => [1, 3]