From: Joel VanderWerf <vjoel@...>
Date: 2009-04-23T07:50:41+09:00
Subject: Re: hygienic startup file

Thomas Hafner wrote:
> Hello,
> 
> a startup file to be loaded by RUBYOPT should have minimal side
> effects. I guess, this pattern will do it:
> 
>   class << Object.new
>     FOO = ... # will not override FOO if defined before
>     BAR = ... # will introduce BAR intermediately
>     ...
>     # Use the constants above to do some wanted side effect on an
>     # object hold by a global variable, e.g. $LOAD_PATH :
>     $:.unshift(FOO, ...)
>   end
>   # no more BAR visible here
> 
> Is there a canonical way to achive this kind of hygiene?
> 
> Regards
>   Thomas

Can't you use local variables to do the same thing?

foo = ...
$:.unshift foo

-- 
       vjoel : Joel VanderWerf : path berkeley edu : 510 665 3407