Scala example source code file (sort.scala)

This example Scala source code file (sort.scala) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Scala tags/keywords

array, array, int, int, string, string

The Scala sort.scala source code

package examples

object sort {

  def sort(a: Array[Int]) {

    def swap(i: Int, j: Int) {
      val t = a(i); a(i) = a(j); a(j) = t
    }

    def sort1(l: Int, r: Int) {
      val pivot = a((l + r) / 2)
      var i = l
      var j = r
      while (i <= j) {
        while (a(i) < pivot) { i += 1 }
        while (a(j) > pivot) { j -= 1 }
        if (i <= j) {
          swap(i, j)
          i += 1
          j -= 1
        }
      }
      if (l < j) sort1(l, j)
      if (j < r) sort1(i, r)
    }

    if (a.length > 0)
      sort1(0, a.length - 1)
  }

  def println(ar: Array[Int]) {
    def print1 = {
      def iter(i: Int): String =
        ar(i) + (if (i < ar.length-1) "," + iter(i+1) else "")
      if (ar.length == 0) "" else iter(0)
    }
    Console.println("[" + print1 + "]")
  }

  def main(args: Array[String]) {
    val ar = Array(6, 2, 8, 5, 1)
    println(ar)
    sort(ar)
    println(ar)
  }

}