99 bottles of beer

99 bottles of beer

# 99 bottles of beer
class Fixnum
  def bottle
    "#{self} bottles of beer".
      sub(/^-1/,'99').
      sub(/^0/,'no more').
      sub(/^(1\ .+)s/, '\1')
  end
  def wall
    "#{self.bottle} on the wall"
  end
  def take
    self > 0 ?
    "Take one down and pass it around" :
    "Go to the store and buy some more"
  end
end
99.downto 0 do |n|
  print "#{n.wall}, #{n.bottle}.\n#{n.take}, #{(n-1).wall}.\n\n".capitalize
end