On Mon, 18 Jun 2001, Nick Transier wrote:
> Here is a basic attribute definition from an O'Reilly Book:
>
> sub new {
>
> my $invocant = shift;
> my $class = ref($invocant) || $invocant;
> my $self = {
> color => "bay",
> legs => 4,
> @_ ,
> };
> return bless $self,$class;
>
> }
>
> What I do not understand is why $self is not defined as a hash %self.
It is defined as a hash -- a hash reference that is blessed into the
package (for all methods, $self is passed implicitly as the first
argument). You can certainly create a hash %self and bless a reference to
it into the class. $self can be a reference to just about anything you
want -- the technical term to what $self is pointing to is 'thingy' --
could be an array, a scalar, etc.
> Also, if you were to only include @_, would you need a comma after it
> -- in other words my $self = {@_}; or {@_,};
Technically, the comma isn't needed the way $self is defined above. Perl
won't complain one way or the other (unlike other languages... :-) ).
-- Brett
http://www.chapelperilous.net/btfwk/
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More people are flattered into virtue than bullied out of vice.
-- R.S. Surtees
