Calling Scala "purist language" sounds riddiculous to me. It is a hybrid of object-oriented and functional styles, with tons of weird hacks like case classes for pattern matching, implicits, type inference that kind of works, but is not full Hindley-Milner, Java bindings that require weird conversions between Java and Scala collection types, _ as a wildcard in few different places. Scala is the opposite of purism. There's a reason why Odersky's "Programming in Scala" has over 800 pages - even listing all the hacks used in the language is not trivial.