Scala Queue dropWhile() method with example
The dropWhile() method is utilized to drop the longest prefix from the front which satisfies a given predicate in a queue.
Method Definition: def dropWhile(p: (A) => Boolean): Queue[A]
Return Type: It returns a new queue that consists of elements after dropping the longest prefix satisfying the given predicate.
Example #1:
// Scala program of dropWhile() // method // Import Queue import scala.collection.mutable. _ // Creating object object GfG { // Main method def main(args : Array[String]) { // Creating queues val q 1 = Queue( 2 , 4 , 6 , 1 , 8 , 3 , 5 ) // Print the queue println(q 1 ) // Applying dropWhile method val result = q 1 .dropWhile(x => {x % 2 == 0 }) // Displays output print( "Queue after using dropWhile() method: " + result) } } |
Output:
Queue(2, 4, 6, 1, 8, 3, 5) Queue after using dropWhile() method: Queue(1, 8, 3, 5)
Example #2:
// Scala program of dropWhile() // method // Import Queue import scala.collection.mutable. _ // Creating object object GfG { // Main method def main(args : Array[String]) { // Creating queues val q 1 = Queue( 1 , 3 , 2 , 7 , 6 , 5 ) // Print the queue println(q 1 ) // Applying dropWhile method val result = q 1 .dropWhile(x => {x % 2 ! = 0 }) // Displays output print( "Queue after using dropWhile() method: " + result) } } |
Output:
Queue(1, 3, 2, 7, 6, 5) Queue after using dropWhile() method: Queue(2, 7, 6, 5)