in reply to hash undef?
if (not defined $time{$recordNumber}){ ... }
You can also check with exists in hashes, the semantic is a little bit different.
Update: A bit explanation: == compares numbers, so in the expression $foo == undef the undef is promoted to 0 and compared with $foo - not what you want.
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Re^2: hash undef?
by Anonymous Monk on Nov 15, 2007 at 15:16 UTC | |
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