rubyworks

# Work with Roman numerals just like normal Integers.
class RomanNumeral < Numeric
  include Comparable

  # The largest integer representable as a roman
  # numerable by this module.
  MAX = 3999

  # Taken from O'Reilly's Perl Cookbook 6.23. Regular Expression Grabbag.
  REGEXP = /^M*(D?C{0,3}|C[DM])(L?X{0,3}|X[LC])(V?I{0,3}|I[VX])$/i

rubyworks

# = Semaphore
#
# Technically a semaphore is simply an integer variable which
# has an execution queue associated with it.
#
# Copyright (c) 2005 Fukumoto

class Semaphore

  def initialize(initvalue = 0)