3 ms·

Scala for the Impatient is definitely the best introduction to Scala (by a wide margin). Re-posting your link: http://blog.typesafe.com/free-pdf-from-typesafe-s

• thebluesky 14y ago
  The preferred way of launching an app in Scala is as follows: object HelloWorld extends App { println("Hello, world!") } Rather than manually creating a main method, as is done in the OP blog. It's also possible to simply write: println("Hello World") and that would be the entire app, but the preferred way of doing things is to extend App