Haskell

Haskell is a pretty odd programming language, for its interface and syntax aren't "smooth" in the way we are used to. Simply seeing "[ stuff ]" in a program, outside vectors, arrays etc. makes my bones shiver.
WIth that "frontend" part done, we may proceed to discuss the base of this language: the fact that it can be very well "chained" is awesome, here talking about compatibility. Haskell functions don't evaluate their parameters (as stated on the official website), meaning that there are many ways you may combine codes.
Let me ask though: You're on AlternativeTo reading a REVIEW on Haskell. Really. Go learn a bit about it on the official site, which also allows you to test it out in a shall, giving you instructions etc.