in reply to Tell me how it works!
Use only on a scalar value, an entire array or hash, or a subroutine n
The undef function will probably not do what you expect on most specia
Hmmm... That is not what the documentation says (at least for versions 5.10 and 5.8.8)
undef - Undefines the value of EXPR, which must be an lvalue. Use only on a scalar value, an array (using "@"), a hash (using "%"), a subroutine (using "&"), or a typeglob (using "*")
An electronic device
Being the designated driver
Spending time with a celebrity
I never won anything
I never play the lottery
I haven't checked my spam folder recently
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