Re: Arbitrarily Many Nested Loops

Jim Gibson <jgibson@xxxxxxxxxxxxxxxxx> wrote in comp.lang.perl.misc:
In article <1143679874.629703.156690@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>,
Jacob JKW <jacobcdf@xxxxxxxxx> wrote:

This is what I have:

-------------
#!perl

for (my $i = 0; $i<=$n_ra->[0]; $i++) {
for (my $j = 0; $j<=$n_ra->[1]; $j++) {
for (my $k = 0; $k<=$n_ra->[2]; $k++) {
$prob_ra->[$i+$j+$k] += (
$f_raa->[0]->[$i] *
$f_raa->[1]->[$j] *
$f_raa->[2]->[$k] *
);
}
}
-------------
But that's obviously messy and more imprtantly I'd like to be able to
decide at run time to have how nested levels to go (probably be on the
order of 50 or 60). I assume that there's a canonical manner in which
this should be handled (using closures I'd guess) but I can't
sufficiently summarize my issue to make it Google-able.

Any advice?

This question was asked several weeks ago, and Anno Siegel had a most
elegant solution. I googled for it but couldn't find.

I am honored, but I think Google is right. I don't remember this
particular problem from the recent past.

I have tried a couple of variants of Ilya's suggestion (using an index
array), but nothing came up to write home (to clpm) about.

Anno
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