Since I have started on the Kotlin Koans I thought I would look at some other languages versions:

Scala:

http://www.scalakoans.org/

Elixir:

https://github.com/elixirkoans/elixir-koans

Haskell:

https://github.com/hskoans/hskoans

I like to keep up with languages.

Currently I am studying too many at once (Elixir, Scala, Haskell) so why not add another one.

This is meant to be a best of breed combination of Scala, Groovy and C#

First thought: It’s the first new language that requires explicit returns. Most recent languages that I have used simply treat the last thing in a function as the result.

I have found the  Kotlin Koans project:

git clone https://github.com/Kotlin/kotlin-koans