Functional Programming Principles in Scala https://www.coursera.org/learn/progfun1 https://www.coursera.org/learn/progfun1 on Coursera. It's taught by Martin O

Functional Programming Principles in Scala https://www.coursera.org/learn/progfun1 https://www.coursera.org/learn/progfun1 on Coursera. It's taught by Martin Odersky, one of the language's creators. Very well organized, highly automated assignment testing (you submit via CLI). I went in wanting to learn Scala, but what I learned about FP has stayed with me for years. Even though I've moved on from Scala I'm a much better programmer for having taken that course.