/usr/share/doc/ruby1.8-examples/examples/observ.rb is in ruby1.8-examples 1.8.7.352-2ubuntu1.6.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 | #!/usr/bin/ruby1.8
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
|