On Jan 29, 2008 1:26 AM, Andrew Limareff <[EMAIL PROTECTED]> wrote:
> Chas. Owens wrote:
>
> > You initialize a hash with a list. So if you want an empty hash then
> > you need to assign an empty list to it:
> >
> > %hash = ();
> >
>
> Couldn't you go
>
> undef( %hash );
>
> to get an undefined re
Chas. Owens wrote:
You initialize a hash with a list. So if you want an empty hash then
you need to assign an empty list to it:
%hash = ();
Couldn't you go
undef( %hash );
to get an undefined ref - leaving the old contents for the system to
free up?
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I think you want
%hash = ();
which will make sure there are no elements in %hash.
Your statement was
%hash = {};
In this case, the {} will return a reference to an empty hash, and
the assignment will then attempt to make this reference into a key in
%hash. Since hash keys can only be stri
On Jan 18, 2008 11:57 AM, Kevin Viel <[EMAIL PROTECTED]> wrote:
> Is there a way to empty/clear a hash in mass?
>
> For instance:
>
> %hash = {} ;
>
>
> Might the above create an reference?
snip
The above does create a reference. In fact, the hash will now contain
something like
%hash = (
"H
See http://perldoc.perl.org/functions/delete.html
Generally speaking (ie yes, there are exceptions), there is no reason
to ever want to delete a variable.
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