Peter Scott schreef:
> Tom Phoenix:
>> In Perl, merely referencing a key
>> in a hash doesn't change the hash. Some non-Perl hash implementations
>> do change the hash in those circumstances, though, so your confusion
>> is understandable.
>
> Not to detract from your point in this thread, but just for the sake
> of completeness, to mention a counterexample corner case:
>
> my %hash;
> foo($hash{bar}{baz});
> print "Oops" if exists $hash{bar};
> sub foo { }
You are not 'merely referencing a key' there, you are using the key, and
then autovivication happens.
> (Any beginners who are way confused by this... you're better off
> forgetting about it until you get heavily into references and lists of
> lists.)
This is a nice article about it:
http://www.sysarch.com/Perl/autoviv.txt
--
Affijn, Ruud
"Gewoon is een tijger."
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