Ruby regex key search

Question

http://ruby-doc.org/core-1.9.3/Hash.html#method-i-include-3F

It is possible to convert hash.has_key?(String) to have a regex search capabilities?

Answer 1

If you are only interested in a yes/no answer, then any? might be a good option:

hash.keys.any? { |key| key.to_s.match(regexp)}

where regexp is a regular expression.