scala 实践，英文版 Scala in Depth is a practical guide to using Scala with deep dives into necessary topics. This book, picking up where introductory books drop off, enables readers to write idiomatic Scala code and understand trade-offs when making use of advanced language features. In particular, this book covers Scala’s implicit and type systems in detail before discussing how these can be used to drastically simplify development. The book promotes the “blended style” of Scala, where paradigms are mixed to achieve something greater .