Scala Samples - Extractors vs Case Classes

ScalaExtractorSample.scala

package com.gmaslowski.scala.samples.extractor

object ScalaExtractorSample extends App {
  val casePeople = List(
    Case.Person("John", "Doe"),
    Case.Person("Jane", "Doe"),
    Case.Person("Jimmy", "Doe"),
    Case.Person("Bobby", "Doe"),
    Case.Person("Jimmy", "Known"),
    Case.Person("Clair", "Known")
  )

  val byHandPeople = List(
    ByHand.Person("John", "Doe"),
    ByHand.Person("Jane", "Doe"),
    ByHand.Person("Jimmy", "Doe"),
    ByHand.Person("Bobby", "Doe"),
    ByHand.Person("Jimmy", "Known"),
    ByHand.Person("Clair", "Known")
  )

  casePeople
    .map {
      case p @ Case.Person(_, "Doe") => (p, "Lastname is Doe.")
      case p @ Case.Person("Jimmy", _) => (p, "Firstname is Jimmy.")
      case p @ Case.Person(_, _) => (p, "Not important.")
    }
    .foreach(println)

  byHandPeople
    .map {
      case p @ ByHand.Person(_, "Doe") => (p, "Lastname is Doe.")
      case p @ ByHand.Person("Jimmy", _) => (p, "Firstname is Jimmy.")
      case p @ ByHand.Person(_, _) => (p, "Not important.")
    }
    .foreach(println)

}

object Case {
  case class Person(firstname: String, lastname: String)
}

object ByHand {

  class Person(val firstname: String, val lastname: String){
    override def toString: String = s"ByHandPerson($firstname, $lastname)"
  }

  object Person {
    def apply(firstname: String, lastname: String) = new Person(firstname, lastname)

    def unapply(person: Person): Option[(String, String)] = Some((person.firstname, person.lastname))
  }
}