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I drew a distinction between "inside-out" (lexicals for each property) and "flyweight" (single lexical holding hashrefs for each object). That may be arbitrary, but I think it's significant as inside-out, defined that way, makes property names into lexical identifiers that can be checked with strict, unlike hash keys:

# regular object $self->{name} = "Larry"; # name is a hash key # flyweight object, as per Damian's book my @objects; $objects->[$$self]->{name} = "Moe"; # name is a hash key # inside-out object my %name; $name{ refaddr $self } = "Curly"; # name is a lexical variable

I don't have TheDamian's Object-Oriented Perl handy at the moment, but I don't recall that it went beyond the flyweight idea. Abigail-II's talk on Lexical::Attributes was the first I'd seen of it, and I hadn't come across any prior art before Re: Where/When is OO useful?.

I certainly believe that Abigail was building upon Damian's foundation -- a point that I made verbally in the talk on p.9, which shows the evolution from class properties to the flyweight pattern as a setup for explaining the inside-out pattern.

I included Damian's book in the reference as valuable background material in general, as this was an introductory talk and I did cover the flyweight pattern, albeit briefly.

If I have overlooked some prior art there or elsewhere, I welcome a specific correction and citation and would be happy to include it in the talk.

-xdg

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In reply to Re^2: Slides from NY Inside-Out Talk by xdg
in thread Slides from NY Inside-Out Talk by ghenry

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