gistfile1.txt

#!/usr/bin/ruby

#creating a new class:
class Anime 
  def initialize(title, year, genre)
    @title=title
    @year=year
    @genre=genre
  end
  def to_s
    "Some more famous are: #@title #@year #@genre"
  end
end

#subclass of 'Anime':
class Newtitles<Anime #meaning from 2009;
  def initialize(title, year, genre, based_on)
    @based_on = based_on
    super(title,year,genre)
  end

  def to_s
    super + "[#@based_on]"  
  end

end

gistfile2.txt

>> newtitle = Newtitles.new("Ghost in the Shell: Stand Alone Complex", 2005, "Cyberpunk", "Ghost In the Shell")
=> #<Newtitles:0x51a7e8 @genre="Cyberpunk", @based_on="Ghost In the Shell", @year=2005, @title="Ghost in the Shell: Stand Alone Complex">
>> newtitle.to_s
=> "Some more famous are: Ghost in the Shell: Stand Alone Complex 2005 Cyberpunk[Ghost In the Shell]"