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Re^2: "undef" is not NULL and what to do about it

by Ovid (Cardinal)
on Feb 22, 2013 at 20:09 UTC ( [id://1020219]=note: print w/replies, xml ) Need Help??


in reply to Re: "undef" is not NULL and what to do about it
in thread "undef" is not NULL and what to do about it

Ah, bugger. I should have been more clear. You're absolutely right that it's very unclear what a given NULL should mean. What I meant was that the behavior of NULL is very clear and predictable, regardless of meaning. There are rare cases where you get a false negative, but unlike undef, you generally don't get a false positive. That's a trade-off I prefer, though I can see that many others don't.

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