Hello once more, On Wed, Jun 27, 2007 at 04:11:36PM +0200, Hoehle, Joerg-Cyril wrote:
Albert Krewinkel wrote:
(for e in-matrix foo with-indices (i j)) That sure is a good way to do this. Maybe you are right, and the python zen "explizit is better than implicit" applies to this situation as well. But I just feel like it's more verbose than necessary.
To me it seems like "Iterate zen". Otherwise you are with things like Series. Actually, naming things simplifies (or make possible) some complex loops.
Seems reasonable; I'll try to adopt this.
(iter (for el in-vector v with-index i) (setf (aref v i) 1)) the expansion code will contain (setq el (aref...)). The Iterate zen is for i index-of-vector. See manual. That would not invoke aref.
The careful reader of the manual might expect (for nil in-vector ... with-index i) to avoid aref given a clever implementation, however Iterate is not Loop, so that construct does not work (yet?) with Iterate.
Looks like I have to re-read the manual more carefully.
Your code may appear to work for you, but your case expression is subtly broken. Please try (for el in-vector v by OR) (for el in-vector v by QUOTE) D'OH! Thanks for pointing this out.
I will rewrite the driver using the `indices-of..' idiom. I don't really see the advantages yet, but that's probably due to a lack of experience on my side. Thanks again the help and for your time, Best Albert