Is this a bug in Perl (nested hash)?
C. Abney
cabney at cyberpass.net
Wed Apr 12 01:11:04 CDT 2000
~sdpm~
On Tue, 11 Apr 2000, John R. Comeau wrote:
> Checking for the existence of a nested key like $hash{key0}{key00}
> causes $hash{key0} to exist. Is that the way it's supposed to work?
> I would think that merely checking for the existence of
> $hash{key0}{key00} would not cause $hash{key0} to exist.
The short answer is "use exists()." The long answer is FTCFMTE. :-)
It has something to do though, I suspect, with how autovivification is
done by perl.
perldoc perlfaq4, perldoc perlfunc
CA
--
Einstein himself said that God doesn't roll dice. But he was wrong. And
in fact, anyone who has played role-playing games knows that God
probably had to roll quite a few dice to come up with a character like
Einstein. -- Larry Wall C. Abney
~sdpm~
The posting address is: san-diego-pm-list at hfb.pm.org
List requests should be sent to: majordomo at hfb.pm.org
If you ever want to remove yourself from this mailing list,
you can send mail to <majordomo at happyfunball.pm.org> with the following
command in the body of your email message:
unsubscribe san-diego-pm-list
If you ever need to get in contact with the owner of the list,
(if you have trouble unsubscribing, or have questions about the
list itself) send email to <owner-san-diego-pm-list at happyfunball.pm.org> .
This is the general rule for most mailing lists when you need
to contact a human.
More information about the San-Diego-pm
mailing list