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#! /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