From: Andrea Fazzi <andrea.fazzi@...>
Date: 2008-10-13T17:31:52+09:00
Subject: Re: [QUIZ] Modular Arithmetic (#179)

Hi,

I realized that Modulo#modularize contains a lot of useless conditionals.

Here below a refactored revision of my solution. Check

http://github.com/remogatto/quizzes/tree/master/179/lib/modulo.rb

for better formatting.

class Modulo

  include Comparable

  [:+, :-, :*].each do |meth|
    define_method(meth) { |other_n| Modulo.new(@n.send(meth, other_n.to_i), @m) }
  end

  def initialize(n = 0, m = 26)
    @n, @m = n % m, m
  end

  def <=>(other_n)
    @n <=> other_n.to_i
  end

  def to_i
    @n
  end

  private

  def coerce(numeric)
    [@n, numeric]
  end

end


Regards,
Andrea