Scala Queue isEmpty() method with example

Scala Queue exists() method with example

Last Updated : 24 Oct, 2019

The exists() method is utilized to check whether a predicate holds for any of the elements of the queue.

Method Definition: def exists(p: (A) => Boolean): Boolean

Return Type: It returns true if the predicate holds true for any of the elements of the queue or else returns false.

Example #1:

// Scala program of exists()  
// 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 exists method  
        val result = q1.exists(x => {x % 7 == 0})  
          
        // Displays output  
        print("Element divisible by 7 exists: " + result) 
    }  
}  

Output:

Queue(1, 3, 2, 7, 6, 5)
Element divisible by 7 exists: true

Example #2:

// Scala program of exists()  
// 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 exists method  
        val result = q1.exists(x => {x == 10})  
          
        // Displays output  
        print("Element 10 exists: " + result) 
    }  
}  

Output:

Queue(1, 3, 2, 7, 6, 5)
Element 10 exists: false

Scala Queue isEmpty() method with example

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