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Scala still has several differences to Java including a stronger type system, traits, pattern matching, and implicits (love them or hate them.) Java is definitely closing the gap on some of the functional aspects though.

Edit: Where did the basic docs on type bounds in Scala go?

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Higher kinded types is a feature that sets the languages apart and is what allows for some very powerful polymorphic code to be written in Scala.

Definitely agree with that. Was looking for a page in the overview section, to drop a link, but that entire topic seems to be gone?

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