String#gsub to maintain case?

Question

When using gsub, is it possible to maintain case?

This is working example, possible to do this without calling gsub twice? Perhaps add case insensitive i to the regex?

 'Strings'.gsub(/s/, 'z').gsub(/S/, 'Z') #=> Ztringz

Goal (obviously doesn't work):

'Strings'.gsub(/s/i, 'z') #=> Ztringz

Answer 1

How about using String#tr:

'Strings'.tr('sS', 'zZ')
# => "Ztringz"