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 :



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// 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)
  
    }

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Output:

(non-empty iterator, non-empty iterator)

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

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// 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)
  
    }

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Output:

(empty iterator, empty iterator)

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



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