[PD] here I go again..dynamic abstractions

Phil Stone pkstone at ucdavis.edu
Tue Feb 10 18:30:40 CET 2009

Frank Barknecht wrote:
> Hallo,
> Mathieu Bouchard hat gesagt: // Mathieu Bouchard wrote:
>> On Sat, 7 Feb 2009, Frank Barknecht wrote:
>>> Messages don't have anything comparable to the canvas' $0.

I missed this the first time it went by, and I think it's central to 
(my) confusion about this...

Messages don't have anything comparable to the canvas' $0, but *message 
boxes do*!  Why, therefore, is $0 not valid in a message box (as a way 
of embedding the canvas-identifier into a message), and further, why are 
people going so far as to suggest new, orthogonal meanings for $0 in a 
message box?  Please, don't do this; it would only make the situation 
much more confusing!



>>> A possible alternative use for $0 in messages would be the selector
>>> ("list", "symbol", ...) as that is the thing before $1, but
>>> implementing that could be even more confusing to beginners.
>> Why would that be confusing to beginners?
> Because it's not the $0 from object boxes.
> Ciao

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