in reply to Undefined JAPH
Great JAPH! Nice obfuscation, interesting layout, funny comments.
I do not believe anyone has used this technique before.Sorry, I beat you to it and gave a lightning talk in 2006 at YAPC::Europe in Birmingham, titled "undef isn't", about how much more fun undef becomes once its SvREADONLY is false and you can start treating it like a variable. May I suggest tie? ;-)