Scala example source code file (iterators.scala)

This example Scala source code file (iterators.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, array/*, double, double, elements, elements, pair, pair

The Scala iterators.scala source code

package examples

object iterators {

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

  def printArray(xs: Array[Double]) =
    xs.iterator foreach { x => println(x) }

  def findGreater(xs: Array[Double], limit: Double) =
    xs.iterator
      .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)
    println("Elements greater than 3.0:")
    findGreater(ar, 3.0) foreach { x => Console.println(ar(x)) }
  }

}