1 package CodeSamples

     2 

     3 object PatternMatching {

     4   def matchTest(x: Any): Any = x match {

     5     case 1 => "one"

     6     case "two" => 2

     7     case y: Int => "scala.Int"

     8     case _ => "many"

     9   }                                               //> matchTest: (x: Any)Any

    10 

    11   matchTest("Two")                                //> res0: Any = many

    12   matchTest("Test")                               //> res1: Any = many

    13   matchTest(1)                                    //> res2: Any = one

    14   matchTest(2)                                    //> res3: Any = scala.Int

    15 

    16   def matchTest2(x: Any) {

    17     x match {

    18       case 1 => "one"

    19       case "two" => 2

    20       case y: Int => "scala.Int"

    21       case _ => "many"

    22     }

    23   }                                               //> matchTest2: (x: Any)Unit

    24 

    25   //Matching Using case Classes

    26   case class Person(name: String, age: Int)

    27 

    28   def caseClassTest(): Unit = {

    29     val alice = new Person("Alice", 25)

    30     val bob = new Person("Bob", 32)

    31     val charlie = new Person("Charlie", 32)

    32 

    33     for (person <- List(alice, bob, charlie)) {

    34       person match {

    35         case Person("Alice", 25) => println("Hi Alice!")

    36         case Person("Bob", 32) => println("Hi Bob!")

    37         case Person(name, age) =>

    38           println("Age: " + age + " year, name: " + name + "?")

    39       }

    40     }

    41   }                                               //> caseClassTest: ()Unit

    42 

    43   caseClassTest()                                 //> Hi Alice!

    44                                                   //| Hi Bob!

    45                                                   //| Age: 32 year, name: Charlie?

    46 }