[vwnc] Some Smalltalk related questions?

Hi, I have a few questions on my quest to get up to speed with Smalltalk:
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Hi  Conrad,

On 4 juin 09, at 08:46, Conrad Taylor wrote:

> Hi, I have a few questions on my quest to get up to speed with  
> Smalltalk:
>
> a)  Is it possible to do parrallel assignment in the Smalltalk?  In  
> short, I would like to swap the values of two variables?
>
> b)  Where can I locate the document(s) for reflexive and meta  
> programming?
>

May be you would like to have a look at my previous work on  
MetaclassTalk
http://vst.ensm-douai.fr/MetaclassTalk

Noury
http://vst.ensm-douai.fr/noury/
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On Jun 4, 2009, at 12:56 AM, Noury Bouraqadi wrote:

>> a)  Is it possible to do parrallel assignment in the Smalltalk?  In
>> short, I would like to swap the values of two variables?

Parallel assignment is not supported in VisualWorks. There was a  
variant that did so under Squeak, once upon a time, but I'm not sure  
if it still does.

anObject become: anotherObject

will swap two objects. Not exactly the same thing as a, b <- b, a.

--
Travis Griggs
Objologist
"The project was so plagued by politics and ego that when the  
engineers requested technical oversight, our manager hired a  
psychologist instead." -- Ron Avitzur

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Note -- travis should also have said "don't use become:"!!

become is fine in low level stuff, but not at most levels of
programming.



Conrad Taylor wrote:

On Thu, Jun 4, 2009 at 7:55 AM, Travis Griggs <[hidden email]> wrote:

On Jun 4, 2009, at 12:56 AM, Noury Bouraqadi wrote:

>> a)  Is it possible to do parrallel assignment in the Smalltalk?  In
>> short, I would like to swap the values of two variables?

Parallel assignment is not supported in VisualWorks. There was a
variant that did so under Squeak, once upon a time, but I'm not sure
if it still does.

anObject become: anotherObject

will swap two objects. Not exactly the same thing as a, b <- b, a.

--
Travis Griggs
Objologist
"The project was so plagued by politics and ego that when the
engineers requested technical oversight, our manager hired a
psychologist instead." -- Ron Avitzur

Noury and Travis, thanks for responding with answers to my questions.

-Conrad

 

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look at joop paper on http://stephane.ducasse.free.fr
as a good starting point on reflction on smalltalk
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