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Showing posts from April, 2005

MVC: Cargo Cult

Don Hopkins posted this to the Bay Piggies mailing list:
"a lot of the related literature seems to use MVC as the canonical
example of a design pattern"

MVC is the canonical example of the "CargoCult" design pattern of
blindly aping Smalltalk without understanding it or considering if there
are any more appropriate design patterns.

I've never heard a good explanation of what a "controller" is really
supposed to do (other than entangle brittle dependencies between the
view and the model, and allow programmers to bill for more hours
maintaining the code). But people always throw in that extra
"controller" class and its requisite complexity, just because Smalltalk
uses them, and it doesn't feel right imitating Smalltalk without the
whole MVC trifecta.

Just because MVC is a commonly used and cited "pattern" doesn't mean
it's the best one to use in all cases. It's better to have a "purpose&q…

Hyperthreaded Micro Threads for Aspect Oriented Programming

I recently discovered a series of articles written by Jon "Hannibal" Stokes on Usually, I stick to learning weird, exotic languages, but I'm really fascinated by his descriptions of modern processors. I'm especially fascinated by the idea of tuning modern day processors and programming techniques so that they take advantage of one another. For instance, C++'s use of automatic variables results in so many function calls, that if these function calls are not inlined, they can play hell on the pipeline, unless branch prediction works well.Having read Hannibal's articles on hyperthreading, SMT, and the Itanium-64, IA-64, I became intriqued by the performance aspects of SMT on aspect oriented programming, AOP. AOP is currently confined mostly to the Java world, so it doesn't have a direct effect on the processor, per se, but I wondered if a natively compiled AOP compiler could better take advantage of an IA-64 processor. It would do this via e…

Hitachi G1000 Pocket PC

I just bought a Hitachi G1000 Pocket PC. I installed Python, Cheetah, Aquarium, and Glass (Aquarium's Web server). I have a simple Web application running in the background, and I can look at it with IE. I can even see the Web application from my laptop over USB from within Linux! There's something intrinsically cool about extremely small Web servers used as an application platform ;)