Scala

Iterator

An iterator isn’t a collection; instead, it gives you a way to access the elements in a collection, one by one

Not able to call the same call a second time, because the iterator has been exhausted

object Demo
{
  def main(args : Array[String])
  {
    var a = Iterator(4, 2, 1, 3)

    while (a.hasNext)
      println(a.next());
  }
}

object Demo
{
  def main(args : Array[String])
  {
    var a = Iterator(4, 2, 1, 3)

    println("Min: "+a.min) // 1
    println("Max: "+a.max) // empty
  }
}

object Demo
{
  def main(args : Array[String])
  {
    var a = Iterator(4, 2, 1, 3)

    var b = a.toArray;

    for(e <- b)
      println(e)
  }
}

Reference

Iterator