Scala Queue ++=() method with example

The ++=() method is utilized to add element of a queue at the back of another queue.

Method Definition: def ++=(xs: IterableOnce[A]): Queue.this.type

Return Type: It returns the given queue with elements of another queue added at its end.

Example #1:

// Scala program of ++=()
// method

// Import Queue
import scala.collection.mutable._

// Creating object
object GfG
{

    // Main method
    def main(args:Array[String])
    {
        // Creating a queue
        val q1 = Queue(3, 4, 5)

        val q2 = Queue(1, 2)

        // Applying ++=() method
        q2.++=(q1)

        // Display output
        print(q2)

    }
}

Output:

Queue(1, 2, 3, 4, 5)

Example #2:

// Scala program of ++=()
// method

// Import Queue
import scala.collection.mutable._

// Creating object
object GfG
{

    // Main method
    def main(args:Array[String])
    {
        // Creating a queue
        val q1 = Queue("for", "geeks")

        val q2 = Queue("geeks")

        // Applying ++=() method
        q2.++=(q1)

        // Display output
        print(q2)

    }
}

Output:

Queue(geeks, for, geeks)