Counting from zero
lecteur at zogotounga.net
Tue May 2 07:15:48 UTC 2006
Duncan Mak wrote:
> I was in a compiler class and was doing a project in Scheme. Like the style
> prefered by Smalltalk, I strived to use only higher-order functions, like
> map, instead of doing explicit iterations (Scheme makes that hard anyhow).
> However, I ran into trouble when I had to iterate two collections together,
> but each at a different offset, i..e matching a[i] to b[i + 2].
I believe the loop macro is implemented in Scheme; it makes this kind of
iterations very easy.
loop for i in list-a
for j in (cddr list-b)
do (your-thing i j)
and you're done
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