Re: Tell me how it works!

From the camel-book:

Use only on a scalar value, an entire array or hash, or a subroutine n
+ame. 
...
The undef function will probably not do what you expect on most specia
+l variables
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Re^2: Tell me how it works! by citromatik (Curate) on Jan 28, 2009 at 15:21 UTC
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 "")** citromatik	[reply]