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Compatible type systems: lol :)

Can anyone expand on the "complementary set of features"? One of the biggest selling points for Scala is Akka, which is basically trying to implement Erlang (as I see it). I'm not very experienced with Erlang, so what's missing from Akka?

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Perhaps by complementary he means: - Scala allows you to break away from the share-nothing, strictly immutable constraints of Erlang when you really need to do that for performance. - Erlang has OTP, Scala has access to the full ecosystem of Java libraries.

Not sure what else is complementary.

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