Scala example source code file (complicatedmatch.scala)

This example Scala source code file (complicatedmatch.scala) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Scala tags/keywords

app, bar, bar, even, even, int, int, list, longword, longword, none, some, string, test

The Scala complicatedmatch.scala source code

object Bar{
  def unapply(x : String) = x == "bar";
}

object Even{
  def unapply(x : Int) = if (x % 2 == 0) Some(x / 2) else None;
}

object Test extends App{
  val LongWord = "supercalifragilisticexpialadocious";

  def foo(x : Int, y : String) : Int = (x, y) match {
    case (Even(i), "bar") => 1
    case (1 | 2 | 3, "foo") => 42;
    case (x, y) if y.length < x => 11;
    case (1 | 2 | 3, Bar()) => 7;
    case (1 | 2 | 3, "bar") => 8
    case (Even(Even(3)), Bar()) => 13;
    case (Even(Even(3)), LongWord) => 13;
    case _ => 0;
  }

  List(
    2 -> "bar",
    2 -> "foo",
    3 -> "foo",
    7 -> "flob",
    3 -> "bar",
    12 -> LongWord
  ).foreach({case (x, y) => println(foo(x, y))});
}