Scala Iterator duplicate() method with example

The duplicate() method belongs to the concrete value member of the class iterator. It generates a duplicate of the iterator which will iterate over the alike order of values. The duplicate iterators are said to be equal if they are put at the identical element.

• Method Definition:
  
  

   def duplicate: (Iterator[A], Iterator[A])
  

• Return Type:
  It returns a pair of iterators.

Example :

// Scala program of duplicate()
// method

// Creating object
object GfG
{

    // Main method
    def main(args:Array[String])
    {

        // Declaring an iterator
        val iter = Iterator(3, 4, 5, 7, 8)

        // Applying duplicate method
        val iter1 = iter.duplicate

        // Displays output
        println(iter1)

    }
}

Output:

(non-empty iterator, non-empty iterator)

Here, the stated iterator is non-empty so, two non-empty iterators are created.
Example :

// Scala program of duplicate()
// method

// Creating object
object GfG
{

    // Main method
    def main(args:Array[String])
    {

        // Declaring an empty-iterator
        val iter = Iterator()

        // Applying duplicate method
        val iter1 = iter.duplicate

        // Displays output
        println(iter1)

    }
}

Output:

(empty iterator, empty iterator)

Here, the stated iterator is empty so, two empty iterators are created.