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			32 lines
		
	
	
	
		
			470 B
		
	
	
	
		
			Ruby
		
	
	
	
	
	
			
		
		
	
	
			32 lines
		
	
	
	
		
			470 B
		
	
	
	
		
			Ruby
		
	
	
	
	
	
#! /usr/local/bin/ruby
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require "thread"
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require "observer"
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class Tick
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  include Observable
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  def initialize
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    Thread.start do
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      loop do
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	sleep 0.999
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	now = Time.now
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	changed
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	notify_observers(now.hour, now.min, now.sec)
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      end
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    end
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  end
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end
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class Clock
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  def initialize(tick)
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    @tick = tick
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    @tick.add_observer(self)
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  end
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  def update(h, m, s)
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    printf "\e[8D%02d:%02d:%02d", h, m, s
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    STDOUT.flush
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  end
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end
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clock = Clock.new(Tick.new)
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sleep
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