unapplySeq example

object HelloWorld {
    object GivenNames {
      def unapplySeq(name: String): Option[Seq[String]] = {
        val names = name.trim.split(" ")
        if (names.forall(_.isEmpty)) None else Some(names)
      }
}
    def greetWithName(name: String) = name match {
      case GivenNames(firstName,secondName, _*) => "Good morning, " + firstName+" "+ secondName + "!"
      case GivenNames(firstName, _*) => "Good morning, " + firstName + "!"
      case _ => "Welcome! Please make sure to fill in your Full name!"
    }

   def main(args: Array[String]) {
      val name1="Ali"
      val name2="James Bond"
      println(greetWithFullName(name1))
      println(greetWithFullName(name2))
   }
}