bacon.rb

#!/usr/bin/env ruby -wKU

module Bacon
  class << self
    attr_reader :crunchy

    def config(crunchy)
      @crunchy = crunchy
    end
  end

  class Peppered
    def crunchy?
      Bacon.crunchy
    end
  end
end

class BLT
  include Bacon
end


Bacon.config(true)
# BLT.config(false) # Doesn't work: "undefined method ‘config’ for BLT:Class"


blt = BLT::Peppered.new

puts blt.crunchy?