From: Gregory Brown <gregory.t.brown@...>
Date: 2008-10-14T02:14:58+09:00
Subject: Re: [QUIZ] Modular Arithmetic (#179)

On Fri, Oct 10, 2008 at 11:13 AM, Matthew Moss <matt@moss.name> wrote:

> ## Modular Arithmetic (#179)

Doesn't handle division, may have some other issues, but more-or-less works.

-greg

class Modulo

  include Comparable

  def initialize(num, mod=26)
    @num = num
    @mod = mod
  end

  def to_i
    @num % @mod
  end

  def coerce(other)
    [other,to_i]
  end

  def <=>(other)
    to_i <=> other.to_i
  end

  def self.modulo_operators(*ops)
    ops.each do |op|
      define_method(op) { |other| Modulo.new(@num.send(op, other.to_i) % @mod) }
    end
  end

  def self.modulo_delegates(*msgs)
    msgs.each { |msg| define_method(msg) { |*args| to_i.send(msg, *args) } }
  end

  modulo_operators :+, :-, :*, :**
  modulo_delegates :to_s

end



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