patricksrobertson · August 31, 2015 17:27
diff --git a/other_implementation.rb b/other_implementation.rb
 class PinVerifier
  attr_reader :user
  def initialize(user)
    @user = user || NullVerifier.new
  end
  
  def valid?(pin)
    user.valid_pin?(pin)
  end
  
  private
  
  class NullVerifier
    def valid_pin?(pin);false;end
  end
 end
	class PinVerifier
	attr_reader :user
	def initialize(user)
	@user = user \|\| NullVerifier.new
	end

	def valid?(pin)
	user.valid_pin?(pin)
	end

	private

	class NullVerifier
	def valid_pin?(pin);false;end
	end
	end