sources/examples/iterators.scala


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package examples;

object iterators {

  def Array(elems: Double*): Array[Double] = {
    val ar = new Array[Double](elems.length);
    for (val i <- Iterator.range(0, elems.length))
      ar(i) = elems(i);
    ar
  }

  def printArray(xs: Array[Double]) =
    Iterator.fromArray(xs) foreach { x => Console.println(x) };

  def findGreater(xs: Array[Double], limit: Double) =
    Iterator.fromArray(xs)
      .zip(Iterator.from(0))
      .filter{case Pair(x, i) => x > limit }
      .map{case Pair(x, i) => i}

  def main(args: Array[String]) = {
    val ar = Array/*[Double]*/(6, 2, 8, 5, 1);
    printArray(ar);
    Console.println("Elements greater than 3.0:");
    findGreater(ar, 3.0) foreach { x => Console.println(ar(x)) }
  }

}