dices.rb

# Author: Dirceu Pereira Tiegs <dirceutiegs@gmail.com>
#
# Script to roll dices (used to play D&D). Example:
#
# >> require 'dices'
# >> 3.d6
# => 10
# >> 3.d6+7
# => 14
# >> 1.d4+2.d8+1.d12+3
# => 32
#

class Numeric
  def method_missing(methodname, *args)
    dice = methodname.to_s
    if %w[d2 d3 d4 d6 d8 d10 d12 d20 d100].include? dice
      self * (rand(dice[1..4]) + 1)
    else
      self.send(methodname, *args)
    end
  end
end