I'm trying to print a "tree" view of a hash of hashes: 
level1
...level1-1
...level1-2
......level1-2-1
...level1-3
level2
and so on..
I need to print the tree in sorted order at each level. I don't want to use Data::Dumper, because it's used by someone non-technical who just wants to check the hierarchy of some data they entered. Note that there can be different levels of hierarchy, there aren't necessarily three levels for each entry. I know I'm doing something wrong with printing the third level, as I see every third level element in the hash being printed, not just the third level elements associated with the current second level. When I check with Data::Dumper, the hash is correct, so there's something wrong with how I'm accessing the third level. The code below doesn't work 
print Dumper(\%categories);
foreach $top ( sort keys %categories){
    if($top =~ /^\s*$/){$top="<blank>";}
    print "$top\n";
    foreach $second ( sort keys %{$categories{$top}}){
       if($second  =~ /^\s*$/){$second="<blank>";}
       print "...$second\n";
       foreach $third (sort keys %{$categories{$top}{$second}}){
        if($third  =~ /^\s*$/){$third="<blank>";}
           print "......$third\n";
       }
    }
}

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In reply to Printing a tree-view of a hash of hashes by pdxperl

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