Scala school
Hmmm, lots of REPL input/output, nearly no informative descriptions. Besides that some descriptions are wrong or inaccurate, three randomly picked examples (and I am not a Scala programmer):* "compose calls the second function and then the first function."* "Maps - It can hold basic datatypes."* "foldRight Is the same as foldLeft except it runs in the opposite direction."I'd recommend friends to buy a good, well-edited book.