It could probably be expressed in Scala too.

You might want to check out:

• Hoogle: http://www.haskell.org/hoogle/
• Hayoo: http://hayoo.fh-wedel.de/
• Dash: http://kapeli.com/dash
• Zeal: http://zealdocs.org/

Dash and Hoogle have excellent integration in Emacs...

Absolutely, thank you.

Fixed.

Done, thanks.

The test code for this kata does some interesting/questionable manipulations which basically require the solution code to be written in a very strict manner. For your solution, this amounts to using var statements and semicolons, and removing the commented line. It's a shame the kata description doesn't mention these details.