delegation_explicit.rb

class RubyTrainingTeam
  def train_new_fellow(name)
    # Trains all new fellow in ruby track
  end
end

class PythonTrainingTeam
  def train_new_fellow(name)
    # Trains all new fellowin python track
  end
end

class PhpTrainingTeam
  def train_new_fellow(name)
    # Trains all new fellow in php track
  end
end

class JavascriptTrainingTeam
  def train_new_fellow(name)
    # Trains all new fellow in javascript track
  end
end

class JavaTrainingTeam
  def train_new_fellow(name)
    # Trains all new fellow in java track
  end
end

class Director
  def train_new_fellow(track, name)
    team = Object.const_get("#{track}TrainingTeam").new
    team.train_new_fellow(name)
  end
end

director_of_training = Director.new
director_of_training.train_new_fellow("Ruby", "Aboki") # => trains Aboki in ruby track

director_of_training.train_new_fellow("Php", "Aboki Brother") # => trains Aboki Brother in php track