roxen.lists.pike.general

Subject Author Date
Re: Importing constants from modules in 7.8.* Mirar @ Pike importmöte för m <6341[at]lyskom[dot]lysator[dot]liu[dot]se> 21-04-2009
Besides, 

> 0==UNDEFINED;
(1) Result: 1

so it can't be used in comparisons to see if anything is UNDEFINED.

zero_type is the only method you can use, iirc?