From: Pit Capitain <pit@...>
Date: 2006-07-18T03:16:03+09:00
Subject: Re: [QUIZ] Negative Sleep (#87)

Ruby Quiz schrieb:
> (...)
> That sounds slightly impossible to implement, doesn't it?  But consider
> something like this:
> 
> 	( Computation.new { ... } + Sleep.new(-1) + Computation.new { ... } ).run
> 
> (...)

This is not a submission, I just wanted to show that with some evil 
hacks it isn't even necessary to invent a new syntax:

   C:\tmp>type test-negative-sleep.rb
   require "negative-sleep"

   def log msg
     where = caller[ 0 ]
     time = Time.now.strftime "%H:%m:%S"
     puts "#{where}  #{time}   #{msg}"
   end

   with_negative_sleep do
     log "before"
     sleep( -2 )
     log "after"
   end

   C:\tmp>ruby test-negative-sleep.rb
   test-negative-sleep.rb:12  20:07:42   after
   test-negative-sleep.rb:10  20:07:44   before

   C:\tmp>

Regards,
Pit