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Интересное использование default params

// http://blog.floehopper.org/presentations/lrug-mock-objects-2007-07-09/
# def started?(clock = Clock.new)

class Clock
  def time
    Time.now
  end
end

class Event
  def initialize(start_time)
    @start_time = start_time
  end
  
  def started?(clock = Clock.new)
    clock.time > @start_time
  end  
end
to ruby params tricks by pongo on Sep 08, 2007
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