Whenever you're trying to debug data structures, I recommend using Data::Dumper. This will help you see the structures in Perl syntax, and will avoid any bugs you may introduce in your own home-spun "dumping" methods.

use Data::Dumper;
...
print Dumper \%hashFoo;
print Dumper $refHashFoo;
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Other useful learning materials are in perlreftut and perllol.

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