Boolean Truther

boolean_truther.rb

# If you prefer TrueClass and FalseClass returns for predicate methods,
# you can `include Boolean::Truther` into your class to automatically generate
# ¿-prefixed methods that return true or false.

# Define a module to automatically generate the ¿-prefixed methods
module Boolean
  module Truther
    def self.included(base)
      base.extend(ClassMethods)
    end

    module ClassMethods
      def method_added(method_name)
        return unless method_name.to_s.end_with?("?")

        # Define a new method prefixed with ¿
        define_method "¿#{method_name.to_s.chomp('?')}" do
          !!send(method_name)
        end

        super
      end
    end
  end

  # Maybe you fancy yourself as a Boolean Falser.
  Falser = Truther
end

# Define a class and include the BooleanTruther module
class Request
  include Boolean::Truther

  # Define a sample method in the class
  def xhr?
    nil
  end
end

# Create an instance of the Truther class and call the generated method
request = Request.new
p request.¿xhr