Of course, Data::Dumper is great for development, but I was looking for a something to run within the actual script. As in:

        
$stmt = qq/SELECT * FROM table WHERE id IN
    (/ . join(',', ('?') x $categories ) . qq/)/;
    $sth = $dbh->prepare($stmt);
    $sth->execute($categories);
[download]

where $categories is a ref to an AoH, and there is only one key name.

Perhaps have a look into the Data::Dumper source code and see how it gets at the AoH data.

CountZero

"If you have four groups working on a compiler, you'll get a 4-pass compiler." - Conway's Law