How to capitalize every word except one?

Question

ruby

There are addresses like ' BARRON WI 54812-9126', RICE LAKE WI 54868-9344';
How can I capitalize every word in such a string, but WIalways keep both letters capitalized?

Answer 1

str.gsub(/\b[A-Z]+\b/) {|m| m == 'WI' ? m : m.capitalize}