Rails version matching

rails_version_comparison.rb

def rails_version_matches?(requirement)
  Gem::Requirement.new(requirement).satisfied_by? Gem::Version.new(::Rails::VERSION::STRING)
end

def rails_version_matches_any?(*requirements)
  requirements.map{ |r| rails_version_matches?(r) }.reduce(:|)
end

def rails_version_matches_all?(*requirements)
  requirements.map{ |r| rails_version_matches?(r) }.reduce(:&)
end