Scala is a hybrid functional and Object Oriented language for the Java Virtual Machine. Scala provides many facilities for writing very concise and powerful code. This session will walk Java and C# programmers through a series of Scala idioms that take advantage of Scala's features. This includes: (1) Map, filter, and fold -- powerful uses of collections; (2) Writing Domain Specific Languages (DSLs); (3) Writing a parser in less than 5 minutes; (4) The joys and performance benefits of immutable collections; and more.