Nearly this exact question gets asked quite frequently around here. I find that References Quick Reference makes the rules of dereferencing Perl data structure references very easy to remember, so I mention it every so often when this question comes up.

        - tye (but my friends call me "Tye")

In reply to (tye)Re: Dereferencing a hash reference to a Hash of Arrays by tye
in thread Dereferencing a hash reference to a Hash of Arrays by fireartist

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