Scala Iterator filter() method with example

The filter() method belongs to the concrete value members of the class AbstractIterator. It is defined in the classes Iterator and IterableOnceOps. It selects all the elements of the stated iterator which satisfies the used predicate.

Method Definition : def filter(p: (A) => Boolean): Iterator[A]

Return Type : It returns a new iterator containing all the elements of the stated iterator which satisfies the given predicate.

Example #1:

filter_none

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// Scala program of filter()
// method
  
// Creating object
object GfG
  
    // Main method
    def main(args:Array[String])
    {
      
        // Creating an Iterator 
        val iter = Iterator(7, 8, 5, 4, 13)
          
        // Applying filter method
        val x = iter.filter(x => {x % 2 == 0})
          
        // Applying next method
        val result = x.next()
          
        // Displays output
        println(result)
      
    }
}

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Output:

8

Example #2:

filter_none

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// Scala program of filter()
// method
  
// Creating object
object GfG
  
    // Main method
    def main(args:Array[String])
    {
      
        // Creating an Iterator 
        val iter = Iterator(3, 9, 5, 1, 13)
          
        // Applying filter method
        val x = iter.filter(x => {x % 3 != 0})
          
        // Applying next method
        val result = x.next()
          
        // Displays output
        println(result)
      
    }
}

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Output:

5


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