From: Robert Klemme <shortcutter@...>
Date: 2007-12-08T20:04:59+09:00
Subject: Re: Dynamic local vars

On 07.12.2007 16:48, MonkeeSage wrote:
> On Dec 7, 8:33 am, Tim Hunter <rmag...@gmail.com> wrote:
>> Jordan Callicoat wrote:
>>
>>> Not so much like a C macro, but more like a C struct...you could...use
>>> a Struct ;)
>>> V = Struct.new(:x, :y).new(nil, nil)
>>> def bar
>>>   V.x = 10
>>>   V.y = 20
>>> end
>>> def foo
>>>   bar
>>>   puts V.x, V.y
>>> end
>>> Regards,
>>> Jordan
>> Of course the Struct is not actually allowing him to share data between
>> bar and foo. It's the global constant V that's doing that.
>> --
>> Posted viahttp://www.ruby-forum.com/.
> 
> Yeah. I thought it fit the desired behavior though, since it shortened
> the call to bar (as per desired behavior) and only adds four more
> chars ("V." twice) over the original example.

Global variables are considered harmful for a reason.  Sometimes more 
explicitness is better.  I.e. in this case I'd rather use multiple 
returns or - more likely - instance variables.  But since I know nothing 
about the algorithm I cannot make a recommendation here.  I'd just 
generally suggest to look at command pattern.

Kind regards

	robert