From: Tim Pease <tim.pease@...>
Date: 2008-04-16T23:51:15+09:00
Subject: Re: at_exit handlers and Process.kill

On Apr 15, 2008, at 7:10 PM, ara.t.howard wrote:
>
> On Apr 15, 2008, at 11:25 AM, Tim Pease wrote:
>> cleanup = lambda {
>> next if $cleanup_was_already_done
>> $cleanup_was_already_done = true
>> # your cleanup code goes here
>> }
>>
>> Signal.list.values.each do |signal|
>> Signal.trap(signal,&cleanup)
>> end
>
> cleanup = lambda do
>  cleanup = lambda{}
>  p 'cleanup'
> end
>

That's not going to work. The various exit handlers already have a  
reference to the cleanup proc, so reassigning the cleanup variable  
will not prevent it from getting called twice. I know that global  
variables are ugly, but there is a time and a place for everything.

And it's way too clever for me ;)

TwP