[plt-scheme] modules 4 newbies

From: Anthony Cowley (acowley at seas.upenn.edu)
Date: Thu Oct 16 16:08:54 EDT 2008

I found Chapter 6 of the Guide to be helpful with this material.

On Thu, Oct 16, 2008 at 4:02 PM, Raoul Duke <raould at gmail.com> wrote:

> hi,
> i'm a plt-clueless newbie trying to do some basic module stuff. i
> sorta figured out why things weren't working, but i still haven't
> managed to figure it all out yet and get it all working, so i'd like
> to ask for help!
> (A) comment on a newbie user experience: figuring out how to be able
> to write modules is way harder than it should be. i think it is due
> to:
> 1) how you write a module in a file depends on context. as i recently
> finally figured out, if you use "#lang scheme" then you do not use
> "(module..." [otherwise you get error messages which are not very
> helpful to the newbie :-].
> 2) the documentation which a newbie finds by googling around for
> things like "plt scheme module" do not explain that; it was only out
> of sheer luck and desperation that i finally checked
> http://docs.plt-scheme.org/quick/#(part._.Modules).
> 3) the complexity of the subject is probably the kind of thing that is
> hard to explain well in a static html/ascii form, rather than in
> person, and maybe plt scheme is 99% used in situations where there's a
> TA available? nevertheless if i ever figure out the nuances then
> hopefully future folks will google and stumble across this thread :-)
> (B) unfortunately, even though i now know why my use of "(module..."
> which is what the overwhelming majority of all docs i found told me to
> use was not right given that i had #lang scheme in there, which i was
> also doing because seemingly most all the intro docs told me to, i'm
> *still* lost as to how to make a module that works. if i remove the
> "#lang scheme" and try to (require scheme) i still get errors (like
> "expand: unbound variable in module in: new" because i'm trying to use
> scheme/gui/base's new frame%, new canvas%, etc.), and if i try to use
> "#lang scheme" instead then i don't see how i can actually create a
> new namespace for my stuff.
> any edification would be appreciated.
> thank you!
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