On: Graham’s Guide to Learning Scala

[thebluesky]

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