On Sat, 11 Apr 2015 21:20:22 -0700
SSC_perl <[email protected]> wrote:
> Could someone please explain the difference between:
>
> %{$self->{'DATA'}} = () }
%{ $self->{'DATA'} } = ();
>
> and
>
> $self->{'DATA'} = {}
>
> I was told that they are equivalent, but they're not. One
> works and the other doesn't, so they must be different. Here's the
> context:
No, they are not the exact same, as this snippet of code shows:
my $self = { DATA => 1 };
%{ $self->{'DATA'} } = ();
If $self->{DATA} does not exist, then they are the same because Perl
does autovivification. To get the first one to behave like the second,
you should delete $self->{DATA}
delete( $self->{DATA} );
%{ $self->{'DATA'} } = ();
--
Don't stop where the ink does.
Shawn
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