Futures and Async Concepts

Then Transform

Transform a ready value in ordered steps.

Then Transform

ThenTransform.scala 
object Main {
  def main(args: Array[String]): Unit = {
    val fetched = 
    val plusOne = fetched + 1
    val doubled = plusOne * 2
    val label = "ready:" + doubled

    println("fetched=" + fetched)
    println("plusOne=" + plusOne)
    println("doubled=" + doubled)
    println("label=" + label)
  }
}

object Main {
  def main(args: Array[String]): Unit = {
    val fetched = 
    val plusOne = fetched + 1
    val doubled = plusOne * 2
    val label = "ready:" + doubled

    println("fetched=" + fetched)
    println("plusOne=" + plusOne)
    println("doubled=" + doubled)
    println("label=" + label)
  }
}

object Main {
  def main(args: Array[String]): Unit = {
    val fetched = 
    val plusOne = fetched + 1
    val doubled = plusOne * 2
    val label = "ready:" + doubled

    println("fetched=" + fetched)
    println("plusOne=" + plusOne)
    println("doubled=" + doubled)
    println("label=" + label)
  }
}
then-transform Future-style `map` or `then` logic takes a ready value and computes the next value. Sequential scalar assignments make the transformation visible.