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Scala immutable TreeSet filter() method
  • Last Updated : 19 Apr, 2020

In Scala immutable TreeSet class, the filter() method is utilised to return a new TreeSet that consists of all the elements that satisfy a given predicate.

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

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

Example #1:




// Scala program of filter() 
// method 
  
// Import TreeSet
import scala.collection.immutable._
  
// Creating object 
object GfG 
  
    // Main method 
    def main(args:Array[String]) 
    
      
        // Creating TreeSet
        val t1 = TreeSet(1, 3, 2, 7, 6, 5
          
        // Print the TreeSet
        println(t1
          
        // Applying filter() method  
        val result = t1.filter(x => {x % 2 == 1})
          
        // Displays output 
        println("Odd Elements: " + result)
          
    
Output:
TreeSet(1, 2, 3, 5, 6, 7)
Odd Elements: TreeSet(1, 3, 5, 7)

Example #2:




// Scala program of filter() 
// method 
  
// Import TreeSet
import scala.collection.immutable._
  
// Creating object 
object GfG 
  
    // Main method 
    def main(args:Array[String]) 
    
      
        // Creating TreeSet
        val t1 = TreeSet(1, 3, 2, 7, 6, 5
          
        // Print the TreeSet
        println(t1
          
        // Applying filter() method  
        val result = t1.filter(x => {x % 2 == 0})
          
        // Displays output 
        println("Even Elements: " + result)
          
    
Output:
TreeSet(1, 2, 3, 5, 6, 7)
Even Elements: TreeSet(2, 6)



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