Scala Iterator forall() method with example
The forall() method belongs to the concrete value members of the Class AbstractIterator. It is defined in the class IterableOnceOps. It tests whether a used predicate holds for all the elements of the stated collection. It may not terminate for the infinite sized collection.
Method Definition : def forall(p: (A) => Boolean): Boolean
Return Type : It returns true if the stated collection is empty or if the given predicate p holds for all elements of this collection, else it returns false.
Example #1:
// Scala program of forall() // method // Creating object object GfG { // Main method def main(args:Array[String]) { // Creating an Iterator val iter = Iterator(3, 6, 15, 12, 21) // Applying forall method val result= iter.forall(x => {x % 3 == 0}) // Displays output println(result) } } |
Output:
true
Example #2:
// Scala program of forall() // method // Creating object object GfG { // Main method def main(args:Array[String]) { // Creating an Iterator val iter = Iterator(3, 6, 15, 19, 21) // Applying forall method val result= iter.forall(x => {x % 3 == 0}) // Displays output println(result) } } |
Output:
false