NAME

Object::Prototype - Prototypal Object Model a la JavaScript

SYNOPSIS

use Object::Prototype;
use What::Ever;
my $classical = What::Ever->new();
$classical->foo("bar");
is $classical->foo, "bar";
my $prototypal = Object::Prototype->new();
$prototypal->foo # bar, of course;
$prototypal->prototype( baz => sub { shift->foo . shift->bar });
$prototypal->baz() # foobar
$classical->baz()  # croaks

DESCRIPTION

Object::Prototype implements JavaScript-like prototypal object system. If you are familiar with JavaScript's object system, you should have no problem using this module. If you are not, please read http://www.crockford.com/javascript/.

There is one advantage over JavaScript, however. As the example above, you can start with conventional, classical, perlish object as the prototype. To find how it is done, just see the source.

EXPORT

None.

METHODS

new($obj [, \%methods ])

Deeply clones $obj and make it a prototypal object. You can optionally add methods by passing a hashref like this;

{ method => sub { ... }, method2 => sub { ... } }

Which is a shorthand for

my $p = Object::Prototype->new($obj);
$p->prototype( method  => sub { ... } );
$p->prototype( method2 => sub { ... } );

prototype($methname [ => \&code ]);

Accessor/Mutator of the object. You can implement the singleton method that way.

constructor()

Returns the constructor object. Consider this as prototypal SUPER.

$p->prototype(method => sub{
  my $self   = shift;
  my $retval = $self->constructor->method(@_);
  # do whatever to $retval
  return $retval
});

SEE ALSO

Class::SingletonMethod, Class::Classless

http://www.crockford.com/javascript/

AUTHOR

Dan Kogai, <dankogai@dan.co.jp>

COPYRIGHT AND LICENSE

Copyright (C) 2006 by Dan Kogai

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.8.8 or, at your option, any later version of Perl 5 you may have available.