Hey Benjamin, I solved the quiz myself but would you mind posting your code
again so I can compare ??
Thanks a ton
Federico
On Thu, Aug 14, 2008 at 2:10 AM, Benjamin L. Russell wrote: On Wed, 13 Aug 2008 14:14:46 +0100, "Chaddai Fouche"
2008/8/13 Bayley, Alistair First, monad /= imperative
It is important to establish this distinction which doesn't seem to be
very clear in some minds... I think Matthias Felleisen probably understands this, but I could be
wrong... I think so too, but we're on Haskell-beginners and the formulation was
much too ambiguous to let it pass, I would prefer that beginners in
Haskell don't start with the idea that Monad are always imperative,
it's already too current a misunderstanding. Can you recommend any specific examples to illustrate this point to a
programmer/educator from a Scheme background arguing that specific
libraries in world.ss are more functional than the monadic examples
for animations in SOE? If possible, I would like to write a rebuttal to his claim, using
specific examples. I had a quick scan of the SOE source and it looks as though all of the
graphics operations are in IO (). I don't see why you couldn't rearrange it
so that describing shapes was purely functional, while rendering was still
IO () (required by OpenGL, I assume), but it looks like it could be quite a
bit of work. That's unfortunate. Of course IO (or some FRP hiding the IO) is still
required to do the rendering, but it would be much nicer to split
those concerns. That's probably the point that Felleisen was addressing. If functions
have any side-effects, then they aren't purely functional, but in
order to perform rendering, side-effects would be necessary in both
Haskell and Scheme, so this can't be his point. Therefore, he must be
referring to other functions written in a more purely functional style
in world.ss than in SOE. In order to address his point, they would
probably be need to be rewritten in a purely functional style. -- Benjamin L. Russell _______________________________________________
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