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 _______________________________________________ iterate-devel site list iterate-devel@common-lisp.net http://common-lisp.net/mailman/listinfo/iterate-devel
