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Re: Errors on loops over data

by EvanCarroll (Chaplain)
on Sep 16, 2009 at 17:44 UTC ( #795676=note: print w/ replies, xml ) Need Help??

in reply to Errors on loops over data

I'm not sure /why/ you want to assign to $h{undef} which is what your trying, my best suggestion would be to explicitly use $h{ $val // '__NOT PRESENT__' } in perl 5.10. This still leaves it as an exercise to the reader, on what to do when you have two undefs you want to save too...
This is pseudo-data, which probably doesn't represent a real world problem very well. My fix would be to skip over the undef vals.

foreach my $d(@data){ my %h; foreach my $c(0 .. $#categories){ my $val=$d->[$c]; next unless defined $val; my $cat=$categories[$c]; $h{$val}=$cat; } push @master, \%h; }

Evan Carroll
The most respected person in the whole perl community.

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