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Academics should stick to pure computer science

Name: Anonymous 2016-03-14 22:58

Every time the academics try to wet their flaccid noodle in the soft, warm crevices of actual programming, they prematurely squirt all over it, and don't get any of their gooey information inside. I'm coming at this from the context of compilers, but I'm sure it applies to most areas. I don't think that anyone could disagree that tomes such as TAoCP are anything less than holy scripture and should be read by anyone who thinks to call them-self a programmer, but beyond that, it's done nothing but waste time. For instance, pure functional programming. Like most academic things, it promises beauty and simplicity and millions of optimizations that can be done. Where are these optimizations? In the math of course. Problem is, most of them never bother to implement them, and on the rare occasion that they do, it's some toy that only shows that particular optimization on a particular instance on a particular program.

The damage comes in when legions of pseudo-intellectuals argue for the style used on the basis that it can merely be shown to allow these optimizations. The rate at which such things actually occur are probably less than one or two percent. Besides looking particularly ``mathy'' in syntax, the result is usually purposeless and never delivers one any of the promises that were theoretically possible.

Name: Anonymous 2016-03-15 16:01

>>20
It seems you are so wired to the notion of common OOP language's subclassing that you totally misunderstand what subtyping actually is.
It is not about objects of class A' extending class A behave differently from objects of class A, but about a parameter expecting a value of type A can also use a value of type A' without breaking any invariant.

With subclassing i.e. extending AND overriding, you'll have a more relaxed constraint: no ``without breaking any invariant''.
Also read Oleg's article more carefully. Actually you should read his reference on Cardelli's paper first to prevent further misunderstanding.
On that note try searching for ``On binary methods'' too. It's about another problem, not with just OOP, but with subtyping.

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