On at least two occasions (but not very many more than that) I've written code like:

Heh. In my test code I use the syntax you've shown quite regularly. I was unaware that xor did the right thing with undef and hence have used the !$x == !$y or !$x != !$y syntax fairly often.

And I also agree with you that I prefer this syntax to xor as it to me makes the intent of the test easier to see.

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demerphq

_{<Elian> And I do take a kind of perverse pleasure in having an OO assembly language...}