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Re: Inheritance: the root of the problem

by tilly (Archbishop)
on Aug 04, 2006 at 04:10 UTC ( #565609=note: print w/replies, xml ) Need Help??

in reply to Inheritance: the root of the problem

Decide how you want inheritance to work, and you can implement it with closures. It won't even take much work. Since closures and OO programming are pretty much orthogonal concepts, there isn't really a natural closure way to do OO. They are pretty unrelated concepts. I like to say it as, "OO is about creating good nouns and closures are about creating good verbs." They are just different ways of thinking about the problem.

The first time I tried to implement an object model with closures was at Re (tilly) 1: Nested Classes. As you can see, it is quite simple. (However I picked a simple model to implement.) At A Cat's eye view of OO you'll find an explanation of that particular inheritance model. If you want some more ideas, there is no shortage of places to look. The Perl 6 design notes, the object models of other languages, CLOS, and so on.

What do YOU want an object model to do for you?

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Re^2: Inheritance: the root of the problem
by apotheon (Deacon) on Aug 04, 2006 at 07:52 UTC

    Decide how you want inheritance to work, and you can implement it with closures.
    That's just it — I don't know yet, and it's the question I seek to answer by way of this discussion (or, at least, a question I seek to get closer to answering by way of this discussion). There are many here at PerlMonks who know great gobs more about OOP and inheritance-like mechanisms than I, and I seek their (your) wisdom.

    print substr("Just another Perl hacker", 0, -2);
    - apotheon
    CopyWrite Chad Perrin

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[Marshall]: stevieb wish you well with water problems, my water was off all day Monday for repairs. Any more progress on .exe info problem?.
[stevieb]: Marshall: no. I commented on the thread yesterday. Visual Studio updates the tags ok, but corrupts the exe
[stevieb]: I advised the OP that a possible workaround would be to add a version function/flag that displays the required copyright/license info instead
[Marshall]: Darn! I'll look at the thread. Must not be updatinga byte count somewhere. The .exe format is a complex critter.
[stevieb]: that way, it's still "hard coded" into the exe at least, despite not being visible via Properties
[Marshall]: I also looked into PerlApp from Active State, but they don't sell their Dev Kit independent of a very expensive ($1,200) per year license anymore.
[Corion]: I would assume that the PE format hasn't changed that much since the days of yore, but it seems that I would be wrong in that assumption
[Marshall]: When I bought my copy 15+ years ago, it was just a couple hundred bucks.
[Marshall]: I looked at MS specs for PE format and I didn't see any changes in last decade, but evidenly that would be wrong.

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