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refinements_example

🔒 Using Refinements for Scoped Monkey Patching​

Refinements allow you to modify classes in a limited scope, avoiding global side effects. Activate them only where needed using using to maintain safer and clearer monkey patches.

module StringRefinement
  refine String do
    def shout
      upcase + "!"
    end
  end
end

class LoudSpeaker
  using StringRefinement

  def announce(message)
    puts message.shout
  end
end

LoudSpeaker.new.announce("hello")
# => "HELLO!"