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Re: Re: Re: Anyone use "xor" in conditionals?

by jsprat (Curate)
on Jul 14, 2003 at 23:41 UTC ( #274226=note: print w/ replies, xml ) Need Help??

in reply to Re: Re: Anyone use "xor" in conditionals?
in thread Anyone use "xor" in conditionals?

Try it with a non-existent directory. Perl will warn if you do a numeric comparison with an undefined expression, while undef will evaluate as false in a boolean comparison.


PS Change the 'if' in your original node to 'unless', but I'm guessing you already know that...

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