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( #3333=superdoc: print w/replies, xml ) Need Help??
Thanks a lot

> You should probably make some of the slots weak.

of course, but ...

I hope this makes it clearer now:

#!/usr/bin/perl use warnings; use strict; use feature qw{ say }; { package Element; use Moo; has name => (is => 'ro'); has active_container => (is => 'rw'); } { package Container; use Moo; has elements => (is => 'ro', default => sub { [] }); sub add_elem { my ($self, $element) = @_; push @{ $self->elements }, $element unless grep $_ == $element, @{ $self->elements }; } sub get_elem { my ($self, $name) = @_; my $elem = (grep $_->name eq $name, @{ $self->elements })[0]; $elem->active_container($self); return $elem } } my $elem0 = 'Element'->new(name => 'one'); my ($cont1, $cont2) = map 'Container'->new, 1, 2; $cont1->add_elem($elem0); $cont2->add_elem($elem0); my $elem1 = $cont1->get_elem('one'); say "OK" if $elem1->active_container == $cont1; my $elem2 = $cont2->get_elem('one'); say "OK" if $elem2->active_container == $cont2; print "Not OK" if $elem1->active_container != $cont1;

C:/Strawberry/perl/bin\perl.exe -w d:/tmp/pm/container_elem.pl OK OK Not OK Compilation finished at Fri Oct 8 17:48:07

Cheers Rolf
(addicted to the Perl Programming Language :)
Wikisyntax for the Monastery


In reply to Re^2: OO Pattern Container x Elements and Method Chaining by LanX
in thread OO Pattern Container x Elements and Method Chaining by LanX

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