Generic Choice

Choose between two fields of the same generic type.

GenericChoice.scala

case class Choice[A](first: A, second: A)

object Main {
  def main(args: Array[String]): Unit = {
    val preferFirst = 
    val first = "fast"
    val second = "safe"
    val choice = Choice[String](first, second)
    val selected = if (preferFirst) choice.first else choice.second
    val length = selected.length

    println("selected=" + selected)
    println("length=" + length)
  }
}

case class Choice[A](first: A, second: A)

object Main {
  def main(args: Array[String]): Unit = {
    val preferFirst = 
    val first = "fast"
    val second = "safe"
    val choice = Choice[String](first, second)
    val selected = if (preferFirst) choice.first else choice.second
    val length = selected.length

    println("selected=" + selected)
    println("length=" + length)
  }
}

same-generic-type Both fields in `Choice[A]` use the same type parameter, so selecting either field produces the same result type. The example prints scalar properties of the selected value.