--- "Mumia W." <[EMAIL PROTECTED]>
wrote:
> On 09/21/2006 07:08 PM, chen li wrote:
> > Hi all,
> >
> > I read some sections in perltoot. In section
> > Autoloaded Data Methods I see some line codes as
> > following:
> >
> > package Person;
> > use Carp;
> > our $AUTOLOAD; # it's a package global
> >
> > my %fields = (
> > name => undef,
> > age => undef,
> > peers => undef,
> > );
> >
> > sub new {
> > my $class = shift;
> > my $self = {
> > _permitted => \%fields,
> > %fields,
> > };
> > bless $self, $class;
> > return $self;
> > }
> >
> > It looks like that _permitted => \%fields and
> %fields
> > are redundant. [...]
>
> That "redundancy" allows you to use inheritance. If
> you have a class
> Employee, with an expanded set of fields, this
> method makes it possible
> to add the fields without having to modify each
> method that uses them.
>
Where can I find more about this kind of syntax?
Thanks,
Li
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