Recursive List Reverse

ReverseList.scala

package axoni

import scala.annotation.tailrec
object ReverseList {

  val list0 = List(1, 2, 3)

  @tailrec
  def revRec(list: List[Int], tsil: List[Int]): List[Int] =
    list match {
      case head :: tail => revRec(tail, head :: tsil)
      case Nil          => tsil
    }

  def revFold(list: List[Int]) : List[Int] =  
    list.foldLeft(List.empty[Int]) { (tsil, i) =>
      i :: tsil
    }


  def main(args: Array[String]) = {

    val result = revRec(list0, Nil)
    val resultFold  = revFold(list0)

    println(s"Recursive Result: ${result}")
    println(s"Fold Left Result: ${resultFold}")
  }

}

Added the foldLeft variant as well.