Programming in Scala Second Edition 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, Inc. P.O. Box 305, Walnut Creek, California 94597 Copyright © 2007-2011 Martin Odersky, Lex Spoon, and Bill Venners. All rights reserved. First edition published as PrePrintTM eBook 2007 First edition published 2008 Second edition published as PrePrintTM eBook 2010 Second edition published 2010 Build date of this impression May 13, 2011 Produced in the United States of America 15 14 13 12 11 2 3 4 5 6 ISBN-10: 0-9815316-4-4 ISBN-13: 978-0-9815316-4-9