Richard Hector rhector at actrix.gen.nz
Fri Nov 8 03:00:56 CST 2002

How do I detect that a function call has returned undef?

Some functions seem to return zero or another number as a valid result,
and undef to indicate failure. But if I try to compare it with anything,
it complains of using an uninitialised value, or something like that.

Unless it's some other bug in my code ...



More information about the Wellington-pm mailing list