On: Underscore's Scala books are now open source

[_pmf_]

I think one can live with Kotlin. Scala is too obtuse and Clojure is just bad and pays a heavy performance penalty when interacting with Java due to internal usage of reflection if no type hints are used.

The only thing I'm missing in Kotlin are some metaprogramming facilities.

[raspasov → _pmf_]

Scala "is too obtuse".

Clojure "is just bad".

Kotlin "one can live with".

Hmm... Lol

[tasuki → _pmf_]

I'll bite: in what way is Scala obtuse?

[_pmf_ → tasuki]

> I'll bite: in what way is Scala obtuse?

(obtuse might be the wrong word; I'm not a native speaker)

In the small: http://www.wartremover.org/doc/warts.html (individually nothing prohibitive, but the sheer amount of caveats is frightening)

In the large: things like binary compatibility breaking between releases (note that this is on a different level from standard library incompatibilities, which are expected); not sure if this is an issue any more, I have last used it around 2009/2010.

[morsch → _pmf_]

It's a style guide (and a static style checker), not a list of caveats. Mutable values are not a caveat. It's like referring to http://checkstyle.sourceforge.net/checks.html as a list of frightening caveats.