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scalaplayframeworksbtimplicit

How to convert Option[List[String]] to List[String] in Scala?

I am having Option of List of String like, Some(List("abc","def","ghi")) and I need to convert to List("abc","def","ghi") in Scala. I Mean Option[List[String]] to List[String].

Solution

  • You should check the documentation for Option. You will find everything you'll need there.

    Here are 2 ideas:

      val optlist = Some(List("abc", "def", "ghi"))
  val list = if (optlist.isDefined) optlist.get else Nil
  val list2 = optlist.getOrElse(Nil)
  println(list)
  println(list2)

    Output:

    List(abc, def, ghi)
List(abc, def, ghi)