First, use the ref() function. If you need more power, use the reftype() function from Scalar::Util. Second, @_[0] should be written as $_[0].
Jeff japhy Pinyan, P.L., P.M., P.O.D, X.S.: Perl, regex, and perl hacker
How can we ever be the sold short or the cheated, we who for every service have long ago been overpaid? ~~ Meister Eckhart

In reply to Re: Determine Reference Types by japhy
in thread Determine Reference Types by abachus

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