Chaining function in Scala using dot notation

Question

So far, the only native method of chaining functions together in Scala I know of is using andThen/compose. It gets the job done but still looks very clunky. For example, if

Answer 1

Starting Scala 2.13 you can use the pipe chaining operator:

import scala.util.chaining._

// def addNumber(i: Int, s: String) = s + i
// def doubleString(s: String) = (s + s, (s + s).length)
// def trimString(i: (String, Int)) = i._1.substring(0, i._2-1)
"Hello".pipe(addNumber(1, _)).pipe(doubleString).pipe(trimString)
// "Hello1Hello"

Answer 2

You can experiment with Scalaz:

  import scalaz._
  import Scalaz._

  def addNumber(i: Int, s: String) = s + i
  def doubleString(s: String) = (s + s, (s + s).length)
  def trimString(i: (String, Int)) = i._1.substring(0, i._2-1)

  def main(args: Array[String]) : Unit  =
    println(addNumber(2, "44") |> doubleString |> trimString)