How to pass &:key as an argument to map instead of a block with ruby?

Question

I wrote this code:

my.objects.map { |object| object.key }

My rubocop said:

Pass &:key as an argument to map instead of a block.

Is there a short way to do the same thing?

Answer 1

Pass &:key as an argument to map instead of a block

means:

my.objects.map(&:key)