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Comment by jjtheblunt | Hacker News Reader

totally agree about sbt being gratuitously complex.

i wonder if Java is judiciously choosing the non crazily digressive parts of Scala, as they both evolve.

That is what Goetz said is the plan for Java. Move slow, let other languages experiment with language features, and then take the best features and implement them better.

Nice : as an ex Scala person for a few years, seems smart.

Well, so far the “better” still remains to be seen... waiting for type-classes to represent monoids, functors, applicatives, monads and foldable.

So far I’ve just seen a complex and wild stream API that mimics it in practice, without all the mental model behind it.

Oh, and what’s this nonsense with Java Option?! Really?

We're yet to see if monoids, functors, and monads are worth it :)

For better I'd say you should look at things like virtual threads vs async/await or kotlins when vs switch expressions.

If you program modern Java or Kotlin map and flatMap are everywhere. I'd say the debate whether functors and monads are useful is over.

Java or Kotlin support functors or monads as design patterns, i.e. this is how a map/flatMap works with an Optional or a Stream.

The question is: if this support is enough or should the type system be enhanced so you can abstract over/compose a functor and/or a monad ?

The answer to this question is IMO still open.

No they are. Seriously, the mental effort I had to endure to hold all these wild APIs in my head! In hindsight it’s infuriating; the gatekeeping, the patronizing condescendence when I was struggling with what are mathematical trivialities.

Screw that... I should have been told sooner

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