[Haskell-cafe] How to fulfill the "code-reuse" destiny of OOP?

Peter Verswyvelen bugfact at gmail.com
Wed Jan 13 04:51:37 EST 2010

On Sun, Nov 1, 2009 at 2:57 AM, Gregory Collins <greg at gregorycollins.net>wrote:

> Doing OO-style programming in Haskell is difficult and unnatural, it's
> true (although technically speaking it is possible). That said, nobody's
> yet to present a convincing argument to me why Java gets a free pass for
> lacking closures and typeclasses.

I might be wrong, but doesn't Java's concepts of inner classes and
interfaces together with adapter classes can be used to replace closures and
typeclasses in a way?

An inner class allows you to implicitly capture the parent object
("environment"), just like a closure does in a sense.

Interfaces group together methods, like type classes do.

Although I'm actually a C# fanboy for doing "industrial" programming, I
think the Java designers did an excellent job, finding a good balance in
language features, ease of use and readability, and although C# does offer
closures and many more FP constructs, I really miss the above Java
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