Yes, that is correct behavior, try using defined and/or length instead. (see update instead)

UPDATE: actually ... those will not work the way you think they will either. Usually one only needs to test for the value of a key, not the key itself. Try greping the keys from the hash, or use a foreach on the keys to see if the key in question is there or not.

Furthermore, try checking only if (exists($List{c}) ) ... exists is not autovivifying the key "c" ... checking $List{c}->{1} is what is causing the key "c" to be created.

jeffa

L-LL-L--L-LL-L--L-LL-L--
-R--R-RR-R--R-RR-R--R-RR
B--B--B--B--B--B--B--B--
H---H---H---H---H---H---
(the triplet paradiddle with high-hat)

In reply to Re: Unexpected exists() behavior by jeffa
in thread Unexpected exists() behavior by tsmoyers

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