Haskell. I prefer Scala as a language to do productive things. But if you want to learn a pure functional style (that you can apply in Scala later as well) then

Haskell. I prefer Scala as a language to do productive things. But if you want to learn a pure functional style (that you can apply in Scala later as well) then Haskell is better becaue it forces you into this style. Few other languages do that.