A comprehensive step-by-step guide Programming in Prepared for jacques weiss Scala artima Martin Odersky Lex Spoon Bill Venners Cover · Overview · Contents · Discuss · Suggest · Glossary · Index Programming in Scala Prepared for jacques weiss PrePrint™ Edition Cover · Overview · Contents · Discuss · Suggest · Glossary · Index iii Thank you for purchasing the PrePrint™ Edition of Programming in Scala. A PrePrint™ is a work-in-progress, a book that has not yet been fully written, reviewed, edited, or formatted. We are publishing this book as a PrePrint™ for two main reasons. First, even though this book is not quite finished, the information contained in its pages can already provide value to many readers. Second, we hope to get reports of errata and suggestions for improvement from those readers while we still have time incorporate them into the first printing. As a PrePrint™ customer, you’ll be able to download new PrePrint™ versions from Artima as the book evolves, as well as the final PDF of the book once finished. You’ll have access to the book’s content prior to its print publication, and can participate in its creation by submitting feedback. Please submit by clicking on the Suggest link at the bottom of each page. Thanks for your participation. We hope you find the book useful and enjoyable. Prepared for jacques weiss Bill Venners President, Artima, Inc. Cover · Overview · Contents · Discuss · Suggest · Glossary · Index Programming in Scala PrePrint™ Edition Prepared for jacques weiss Martin Odersky, Lex Spoon, Bill Venners artima A RTIMA P RESS M OUNTAIN V IEW, C ALIFORNIA Cover · Overview · Contents · Discuss · Suggest · Glossary · Index v Programming in Scala PrePrint™ Edition Version 2 Martin Odersky is the creator of the Scala language and a professor at EPFL in Lausanne, Switzerland. Lex Spoon worked on Scala for two years as a post-doc with Martin Odersky. Bill Venners is president of Artima, Inc. Artima Press is an imprint of Artima