> Only this isn't ever going to work because there's no way in pure perl that
> you can create such a structure - what it writes doesn't work because
> $VAR1 doesn't have a value at the point of assignment, and even if it wrote
> the fixup after the initial creation of $VAR1 as:
>
> $VAR1->{'4'} = ${\$VAR1->{'3'}};
>
> because the hash assignment does a copy, not a binding.
But if I do this in Perl:
$VAR1->{3} = undef;
$VAR1->{4} = undef;
Data::Dumper understands it just fine. Aren't the values aren't both
set to PL_sv_undef (and if so why doesn't it confuse Data::Dumper)?
Or does Perl make a copy of PL_sv_undef and set the values to the
copies? I thought the point of the global variables was to avoid
making copies in situations like this ...
--
Will
