Thanks very much, all. It's interesting that not only had I never heard of 'ref', but that my searches through the index of the Camel Book didn't turn it up. I've decided to use Scalar::Util::reftype.

Thanks also for the note on prototypes.

In reply to Re^2: How to tell if I have a string, or a ref to a hash by mshaw
in thread How to tell if I have a string, or a ref to a hash by mshaw

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