Scala Queue +:() method with example

Scala Queue filter() method with example

Last Updated : 24 Oct, 2019

The filter() method is utilized to return a new queue that consists of all the elements that satisfy a given predicate.

Method Definition: def filter(pred: (A) => Boolean): Queue[A]

Return Type: It returns a new queue that consists of all the elements that satisfy a given predicate.

Example #1:

// Scala program of filter()  
// 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 filter method  
        val result = q1.filter(x => {x % 2 == 1})  
          
        // Displays output  
        print("Odd elements: " + result) 
    }  
}  

Output:

Queue(1, 3, 2, 7, 6, 5)
Odd elements: Queue(1, 3, 7, 5)

Example #2:

// Scala program of filter()  
// 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 filter method  
        val result = q1.filter(x => {x % 3 == 0})  
          
        // Displays output  
        print("Elements divisible by 3: " + result) 
    }  
}  

Output:

Queue(1, 3, 2, 7, 6, 5)
Elements divisible by 3: Queue(3, 6)

Scala Queue +:() method with example

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