gistfile1.rb

class Defaults
  # Getters/setters
  attr_accessor :theme, :lang, :page

  def initialize
    # ....
  end

  def clone
    $stderr.puts 'Cloning the registry is forbidden'
  end

  # Getters/setters voor defaults 
  def defaults
    self
  end

  def defaults=(session)
    if session == 0
      self.page = 22
      self.lang = 1
      self.theme = 2
    elsif session = 1
      self.page = 0 # ...
      self.lang = 0 # ...
      self.theme = 0 # ...
    end
  end

  def clear_default_session
    # ...
  end
end