This is a strange one, but I've spent a whole day on it and I still can't figure it out.

I'm using the loop:

foreach my $article (keys %locations) {
        process_article(*WFH, \%{$locations{$article}}, [], \@all_chro
+ms);
        }

[download]

Basically what it does is go over the keys of a hash of hashes and pass the hash associated with each key on to a sub-routine. It does this fine for all entries except the last one. The last one it passes as having no values (that is $article=''). I can't figure out why. I printed all the keys to the hash of hashes just before the last iteration to make sure they're all there and they are. Also, a few lines before this loop I call it similarly:

 foreach my $article (keys %locations) {
        process_article(*WFH, \%{$locations{$article}}, \@{$lists{"$li
+st"}}, \@all_kwords);
        }

[download]

And this works just fine. The only difference I can see between the two loops is that I'm passing a reference to a full array instead of an empty one.

Any ideas?

-----------------------------------

Any comments about coding style are welcome.

In reply to Problem with a hash of hashes by dannoura

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