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A companion booklet to "Functional Programming in Scala": Chapter notes, errata, hints, and answers to exercises Paperback – March 6, 2015
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How does this companion book help? It addresses a problem that's easy to have with Scala. The language looks so easy, so simple, it's too easy to just form a vague mental association about the underlying code without having an accurate understanding. This is a problem with all programming, but especially so with such a concise and powerful language as Scala.
What this book delivers is extra insight, plus the ANSWERS TO EVERY EXERCISE. Naively, one might think that this might be a poor idea, but it isn't. It's only a poor idea if one is a teacher and relies on giving students exercises from a book for homework assignments.
In self-study, having all the answers is a HUGE and NECESSARY advantage. Without answers, you might be just guessing at a problem for a while. With such a complex language as Scala (not complex as a language per se, but in all the way it's orthogonal parts can compose), why do that to yourself?
Bravo, Runar! My sincerest thanks for writing this companion and making it available. I really love it, and I really believe it is helping me achieve my dream of being a Java/Scala diglot!