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-rw-r--r--sample/observ.rb31
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diff --git a/sample/observ.rb b/sample/observ.rb
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+#! /usr/local/bin/ruby
+
+require "thread"
+require "observer"
+
+class Tick
+ include Observable
+ def initialize
+ Thread.start do
+ while TRUE
+ sleep 0.999
+ changed
+ notify_observers(Time.now.strftime("%H:%M:%S"))
+ end
+ end
+ end
+end
+
+class Clock
+ def initialize
+ @tick = Tick.new
+ @tick.add_observer(self)
+ end
+ def update(time)
+ print "\e[8D", time
+ STDOUT.flush
+ end
+end
+
+clock = Clock.new
+sleep