gistfile1.scala

case class Person(firstName: String, lastName: String, age: Int)

object Person extends App {
  // Convert Strings like "Hans Maier, 23" into a Person instance.
  def apply(value: String): Person = {
    import java.util.regex._
    val pattern = Pattern.compile("""(\w+) (\w+), (\d+)""")
    val matcher = pattern.matcher(value)
    new Person(matcher.group(1), matcher.group(2), matcher.group(3).toInt)
  }

  println(Person("Hans Maier, 23"))
}

/*
Exception in thread "main" java.lang.IllegalStateException: No match found
	at java.util.regex.Matcher.group(Matcher.java:536)
	at workshop.Person$.apply(Person.scala:16)
	at workshop.Person$.delayedEndpoint$workshop$Person$1(Person.scala:19)
	at workshop.Person$delayedInit$body.apply(Person.scala:10)
	at scala.Function0$class.apply$mcV$sp(Function0.scala:40)
	at scala.runtime.AbstractFunction0.apply$mcV$sp(AbstractFunction0.scala:12)
	at scala.App$$anonfun$main$1.apply(App.scala:76)
	at scala.App$$anonfun$main$1.apply(App.scala:76)
	at scala.collection.immutable.List.foreach(List.scala:381)
	at scala.collection.generic.TraversableForwarder$class.foreach(TraversableForwarder.scala:35)
	at scala.App$class.main(App.scala:76)
	at workshop.Person$.main(Person.scala:10)
	at workshop.Person.main(Person.scala)
*/