Inside-Out Object Model

tomazos has asked for the wisdom of the Perl Monks concerning the following question:

Replies are listed 'Best First'.
Re: Inside-Out Object Model by xdg (Monsignor) on Nov 05, 2006 at 22:03 UTC
Here's a (certainly incomplete) list of major posts on the topic: Object-Oriented Perl - Inside-Out Technique Re: Where/When is OO useful? Re: Tutorial: Introduction to Object-Oriented Programming A different OO approach Yet Another Perl Object Model (Inside Out Objects) Class::InsideOut - yet another riff on inside out objects. Threads and fork and CLONE, oh my! inside-out objects using arrays? Array-based Inside-out Objects with Object::InsideOut How to use Inheritance with Inside-Out Classes and Hash Based Classes Inside-out objects inheriting from hash-based classes Seeking inside-out object implementations Anti-inside-out-object-ism Overriding bless for inside-out object safety Introducing Class::InsideOut -xdg Code written by xdg and posted on PerlMonks is public domain. It is provided as is with no warranties, express or implied, of any kind. Posted code may not have been tested. Use of posted code is at your own risk.	[reply]
Re: Inside-Out Object Model by clinton (Priest) on Nov 05, 2006 at 20:48 UTC
Here's a great place to start: Slides of a presentation about Inside Out objects by xdg.	[reply]
Re: Inside-Out Object Model by ikegami (Patriarch) on Nov 05, 2006 at 19:17 UTC
Thore are big questions. What have you found out so far? Inside-Out objects have been discussed on Perl Monks before, — use Super Search — there are modules to facilitate their use on CPAN, and I'm sure there are presentations on them on the web.	[reply]
Re: Inside-Out Object Model by EvanK (Chaplain) on Nov 05, 2006 at 22:23 UTC
As well, you may want to get your hands on a copy of Perl Best Practices, as it explains a great deal about inside-out objects, as well as just is generally a good book to have. __________ Build a man a fire, and he'll be warm for a day. Set a man on fire, and he'll be warm for the rest of his life. - Terry Pratchett	[reply]
Re^2: Inside-Out Object Model by xdg (Monsignor) on Nov 06, 2006 at 03:02 UTC
I agree it's a great book to have, but it actually explains a lot less than the articles I listed above or the talk I gave at YAPC::NA this year. In particular, it does not sufficiently address some of the shortcomings and pitfalls of inside-out objects. It's certainly not where I would suggest anyone go to learn about inside-out objects, though it has increased awareness and sent people to places like Perl Monks in search of details. -xdg Code written by xdg and posted on PerlMonks is public domain. It is provided as is with no warranties, express or implied, of any kind. Posted code may not have been tested. Use of posted code is at your own risk.	[reply]
Re: Inside-Out Object Model by Anonymous Monk on Nov 06, 2006 at 08:47 UTC
What are the pros and cons of an Inside-Out Object Model? Pros: Encapsulation of attributes: only the scope that defines the attributes can get at them. Inheritance always works: the implementation isn't dependent on how a super class is implemented. Multiple inheritance is potentially easier. Cons: It's more complex, you need for instance a DESTROY function. By default, they don't work after splitting of threads, unless you set up a special CLONE method. (They should work fine if you only create objects after you've split up your threads). Due to the encapsulation, you will need to do extra work when serializing. There's far less documentation. "Everyone" still gets to learn hash based objects when learning OOP in Perl.	[reply]
Re^2: Inside-Out Object Model by jdhedden (Deacon) on Nov 09, 2006 at 01:38 UTC
Object::InsideOut is a full-featured insideout object suport module that handles all the cons mentioned above. It is extensively tested, well-documented and actively supported. Remember: There's always one more bug.	[reply]
Re: Inside-Out Object Model by sh1tn (Priest) on Nov 05, 2006 at 22:18 UTC
It's all about code protection	[reply]
Re: Inside-Out Object Model by jdporter (Chancellor) on Nov 06, 2006 at 03:41 UTC
Super Search. But a list of relevant articles to get you started can be found on my patio. We're building the house of the future together.	[reply]
Re: Inside-Out Object Model by Anonymous Monk on Nov 06, 2006 at 08:37 UTC
What are the different ways you can use an Inside-Out Object Model in Perl 6? Who cares? None of the problems with traditional, hash based, objects in Perl5 that Inside-Out Objects solve exist in Perl6. So, there's no need for Inside-Out Objects in Perl6. In fact, the big problem with objects in Perl5 is that the objects in Perl5 are very minimal - there's no build-in support for object attributes. And that's where the problems come from. Perl6 has build-in support for object attributes, and hence, Inside-Out Objects aren't necessary. Of course, if it's indeed true that all perl5 programs work with Perl6, the answer is "exactly the same way as you do in perl5".	[reply]