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 q1 = Queue(2, 4, 6, 1, 8, 3, 5)

        // Print the queue
        println(q1)

        // Applying dropWhile method
        val result = q1.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 q1 = Queue(1, 3, 2, 7, 6, 5)

        // Print the queue
        println(q1)

        // Applying dropWhile method
        val result = q1.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)