Op 30-6-2012 1:38, Neil Van Dyke schreef:
Stephen Bloch wrote at 06/29/2012 06:01 PM:
Either you introduce this stuff much better than I do, or your
students are much sharper.
For the possible benefit of any students reading, I think someone say
it, rather than leave it implied: Or the difference could be an
isolated effect of, say, some subtle difference in how one concept was
first introduced in their respective educations, not a reflection on
the instruction or students overall.
Aside: I think students are much the same everywhere, and most all
students have potential to be good at this stuff. But learning this
stuff well requires a lot of work, and I think students generally do
need to have sufficient sense that they're ``sharp,'' so that they
stick with it and put in the necessary work. Or, there is another
category of person, who sees themself as slow but determined; that
will also lead to learning the stuff, if the self image gets them to
put in the necessary work. (However, the ones who are self-assured
and yet who don't do the learning work... they are doomed to be dim
and to have few job options other than some kind of politician.)
Neil V.
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Im rereading the chapter and I think I found a piece of the puzzle.
In the chapter there is a mention of this :
;A SIGS(short for "space invader game state") is one of:
;--(make-aimUFO <#%28tech._mix._ufo%29>Tank <#%28tech._mix._tank%29>)
;--(make-firedUFO <#%28tech._mix._ufo%29>Tank
<#%28tech._mix._tank%29>Missile <#%28tech._mix._missile%29>)
I can do the same for my problem.
; A Vanimal is one of :
; - (make-Vcat ( x happiness)
; (make-Vcham ( x happiness)
So Vanimal is not a struct but strictly a name.
Am I on the right track.
Roelof
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