1 files changed, 32 insertions, 0 deletions
diff --git a/ruby_1_8_5/sample/observ.rb b/ruby_1_8_5/sample/observ.rb
new file mode 100644
index 0000000000..72e5178b38
--- /dev/null
+++ b/ruby_1_8_5/sample/observ.rb
@@ -0,0 +1,32 @@
+#! /usr/local/bin/ruby
+
+require "thread"
+require "observer"
+
+class Tick
+  include Observable
+  def initialize
+    Thread.start do
+      loop do
+	sleep 0.999
+	now = Time.now
+	changed
+	notify_observers(now.hour, now.min, now.sec)
+      end
+    end
+  end
+end
+
+class Clock
+  def initialize(tick)
+    @tick = tick
+    @tick.add_observer(self)
+  end
+  def update(h, m, s)
+    printf "\e[8D%02d:%02d:%02d", h, m, s
+    STDOUT.flush
+  end
+end
+
+clock = Clock.new(Tick.new)
+sleep