Hello,
Here's a simple demonstration of how to achive a "trails" effect in demo
code:
http://github.com/dharmatech/agave/raw/master/demos/trails.scm
It's the coolest application of circular lists I've seen. :-) I'm using
a circular list as circular queue. Perhaps I should use a macro like this:
(define-syntax enqueue-circular
(syntax-rules ()
( (enqueue-circular lis elt)
(begin
(set-car! lis elt)
(set! lis (cdr lis))) )))
Then again, I'm having to pull in the (rnrs mutable-pairs) library;
Moreover, I've heard talk of perhaps eventually moving away from mutable
pairs in Scheme. I wonder what the idiomatic approach to my circular
queue would be in that case? I guess there'd be some separate library
for constructing lists made out of mutable cells?
Ed
