How do higher-kinded types differ between Scala and Haskell?

How do higher-kinded types differ between Scala and Haskell?

Higher-kinded types allow you to abstract over type constructors. In Scala, they are used with traits and type parameters, while Haskell uses them in a more flexible way with type classes.

Can you give an example of higher-kinded types in both languages?

Sure! In Scala, you might define a trait like Functor[F[_]] which takes a type constructor F. In Haskell, you would define a type class like class Functor f where ... which also takes a type constructor.

What are the practical implications of these differences?

In Scala, higher-kinded types can lead to more complex type hierarchies, while Haskell's type classes provide more flexibility and can lead to simpler code in some cases.

Which language do you think handles higher-kinded types better?

It depends on the context! Haskell's type classes are often seen as more powerful, but Scala's approach integrates well with its object-oriented features.