scala-lang

I know it's not in the options you listed, but why not Scala? It has the nice things of the languages above, combined together: - a concise high-level programming language - a compiler that helps avoiding bugs - fast runtime - access to a great ecosystem of libraries (In better words: https://github.com/scala/scala-lang/pull/852#issuecomment-37...) Moreover, if you work with Data Scientists you might find convenient working in Spark's native language. A great thing about Scala is that you can either use as a better Java (availability of developers) or go fully functional-category theory like Haskell with libraries such as Cats.

The maintainers might not see your comment, I encourage you to make a PR: https://github.com/scala/scala-lang

None of this makes any sense to me (except that these unfounded claims are not charitable). Lightbend (my employer) builds our whole platform in Scala, and we are proud to say you'll have the best experience using it from Scala (though Java 8 will do too, if that's more your jam). Sure, we make some money from training, but we are far more interested in having as many people use Scala so that they'll be even more productive using our platform. My team at Lightbend is responsible the majority of the Scala 2.x compiler and standard library work. That's our focus. We do try to help out on the documentation front over at https://github.com/scala/scala-lang. You can easily see for yourself that 90% of the PRs there get merged. Don't boo -- submit a PR!

The staircase in the picture down the page is mirrored compared to the Scala logo. I've added some css to 'correct' this ;-) Pull request here: https://github.com/scala/scala-lang/pull/75