Philip Newton wrote: > Having $seen{$word}++ turn $seen{$word} to undef is bad, if (undef)++ > assumes NULL semantics everywhere, hence "one more than unknown" = "still > unknown". Right. Applying NULL semantics to undef would be bad. The counterproposals to RFC 263, along the lines of "use tristate", seem to overlook this sort of situation. They also overlook the beneficial debugging warnings that would be lost for inappropriate use of uninitialized variables that would be lost if you use undef for NULL. -- Glenn ===== Even if you're on the right track, you'll get run over if you just sit there. -- Will Rogers ____________NetZero Free Internet Access and Email_________ Download Now http://www.netzero.net/download/index.html Request a CDROM 1-800-333-3633 ___________________________________________________________
- Re: RFC 263 (v1) Add null() keyword and fundame... iain truskett
- Re: RFC 263 (v1) Add null() keyword and fundame... Damien Neil
- Re: RFC 263 (v1) Add null() keyword and fundame... Russ Allbery
- Re: RFC 263 (v1) Add null() keyword and fundamental data... John Porter
- Re: RFC 263 (v1) Add null() keyword and fundamental... Tom Christiansen
- Re: RFC 263 (v1) Add null() keyword and fundamental data... Russ Allbery
- Re: RFC 263 (v1) Add null() keyword and fundamental... Tom Christiansen
- Re: RFC 263 (v1) Add null() keyword and fundamental... Philip Newton
- Re: RFC 263 (v1) Add null() keyword and fundame... Tom Christiansen
- Re: RFC 263 (v1) Add null() keyword and fundame... Philip Newton
- Re: RFC 263 (v1) Add null() keyword and fundame... Glenn Linderman
- Re: RFC 263 (v1) Add null() keyword and fundame... Russ Allbery
- Re: RFC 263 (v1) Add null() keyword and fundame... Glenn Linderman
- Re: RFC 263 (v1) Add null() keyword and fundame... Russ Allbery
- Re: RFC 263 (v1) Add null() keyword and fundame... Glenn Linderman
- Re: RFC 263 (v1) Add null() keyword and fundame... John Porter
- Re: RFC 263 (v1) Add null() keyword and fundame... Russ Allbery
- Re: RFC 263 (v1) Add null() keyword and fundame... Glenn Linderman
- Re: RFC 263 (v1) Add null() keyword and fundame... Bryan C . Warnock
- Re: RFC 263 (v1) Add null() keyword and fundamental data... Paris Sinclair
- Re: RFC 263 (v1) Add null() keyword and fundamental... Glenn Linderman