template_pattern_1.rb

class Poker

  def evaluate_cards
     primitive_operation1
     primitive_operation2
  end

  def primitive_operation1
    raise "template method called!"
  end

  def primitive_operation2
    raise "template method called!"
  end

end
   
class TexasHoldEmPoker <Poker

  def primitive_operation1
    #...
  end

  def primitive_operation2
    #...
  end

end

class OmahaPoker <Poker

  def primitive_operation1
    #...
  end

  def primitive_operation2
    #...
  end

end