Map an array modifying only elements matching a certain condition

Question

In Ruby, what is the most expressive way to map an array in such a way that certain elements are modified and the others left untouched?

This is a straight-forw

Answer 1

If you don't need the old array, I prefer map! in this case because you can use the ! method to represent you are changing the array in place.

self.answers.map!{ |x| (x=="b" ? x+"!" : x) }

I prefer this over:

new_map = self.old_map{ |x| (x=="b" ? x+"!" : x) }