Scala example source code file (lists.scala)

This example Scala source code file (lists.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, console, l1, l1, l1count, l2, l3, l3, listbuffer, listbuffer

The Scala lists.scala source code

/* The Computer Language Shootout 
   http://shootout.alioth.debian.org/
   contributed by Isaac Gouy (Scala novice)
*/

import collection.mutable.ListBuffer;

object lists {
   def main(args: Array[String]) = {
      var n = toPositiveInt(args);
      val nSize = 10;
      var L1Count = 0;
      var i = 0;

      while (n > 0) {
         var L1 = new ListBuffer[Int]();
         i=0; while (i < nSize){ L1 += i; i=i+1; } 
         var L2 = L1.clone().asInstanceOf[ListBuffer[Int]];
         var L3 = new ListBuffer[Int]();
         while (L2.length > 0) L3 += L2.remove(0); 
         i = L3.length;
         while (i > 0){ i=i-1; L2 += L3.remove(i); }

         Console println(L2 length);
         n = n - 1;
      }
   }

   private def toPositiveInt(s: Array[String]) = {
      val i = 
         try { Integer.parseInt(s(0)); } 
         catch { case _ => 1 }
      if (i>0) i; else 1;
   }
}