tchrist@convex.com (Tom Christiansen) (12/17/90)
I know this is beating a dead horse, and we're still waiting
for Larry to emerge from his sequesterment to actually comment
on this stuff, but I just discovered a pretty (to me) counter-
intuitive implication that I wanted to add.
@x{'a'..'g'} = ();
print("keys are: ", join(", ", sort keys %x), "\n");
print((defined $x{'c'}) ? "defined" : "not defined", "\n");
This prints "not defined". Keys claims that there's a "c" element,
but defined says otherwise. This seems inconsistent. I'm still
looking for a useful application of this phenomenon.
--tom
--
Tom Christiansen tchrist@convex.com convex!tchrist
"With a kernel dive, all things are possible, but it sure makes it hard
to look at yourself in the mirror the next morning." -meallbery@NCoast.ORG (Brandon S. Allbery KB8JRR) (12/19/90)
As quoted from <111562@convex.convex.com> by tchrist@convex.com (Tom Christiansen): +--------------- | @x{'a'..'g'} = (); | print("keys are: ", join(", ", sort keys %x), "\n"); | print((defined $x{'c'}) ? "defined" : "not defined", "\n"); | | This prints "not defined". Keys claims that there's a "c" element, | but defined says otherwise. This seems inconsistent. I'm still | looking for a useful application of this phenomenon. +--------------- Symbol tables. You've seen symbol "c", but you don't know what its value is yet. (Come to think of it, isn't this used in the current implementation of packages?) ++Brandon -- Me: Brandon S. Allbery VHF/UHF: KB8JRR on 220, 2m, 440 Internet: allbery@NCoast.ORG Packet: KB8JRR @ WA8BXN America OnLine: KB8JRR AMPR: KB8JRR.AmPR.ORG [44.70.4.88] uunet!usenet.ins.cwru.edu!ncoast!allbery Delphi: ALLBERY