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Scala TreeSet dropWhile() method with example
  • Last Updated : 02 Nov, 2019

In Scala TreeSet class, the dropWhile() method is utilized to drop the longest prefix from the front which satisfies a given predicate in a TreeSet.

Method Definition: def dropWhile(p: (A) => Boolean): TreeSet[A]

Return Type: It returns a new TreeSet that consists of elements after dropping the longest prefix satisfying the given predicate.

Example #1:

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// Scala program of dropWhile() 
// method 
  
// Import TreeSet
import scala.collection.mutable._
  
// Creating object 
object GfG 
  
    // Main method 
    def main(args:Array[String]) 
    
      
        // Creating TreeSet
        val t1 = TreeSet(2, 4, 6, 7, 8, 9
          
        // Print the TreeSet
        println(t1
          
        // Applying dropWhile() method  
        val result = t1.dropWhile(x => {x % 2 == 0})
          
        // Displays output 
        println("TreeSet after using dropWhile() method: " + result)
          
    

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Output:

TreeSet(2, 4, 6, 7, 8, 9)
TreeSet after using dropWhile() method: TreeSet(7, 8, 9)

Example #2:

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// Scala program of dropWhile() 
// method 
  
// Import TreeSet
import scala.collection.mutable._
  
// Creating object 
object GfG 
  
    // Main method 
    def main(args:Array[String]) 
    
      
        // Creating TreeSet
        val t1 = TreeSet(3, 5, 6, 7, 8, 9
          
        // Print the TreeSet
        println(t1
          
        // Applying dropWhile() method  
        val result = t1.dropWhile(x => {x % 2 != 0})
          
        // Displays output 
        println("TreeSet after using dropWhile() method: " + result)
          
    

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Output:

TreeSet(3, 5, 6, 7, 8, 9)
TreeSet after using dropWhile() method: TreeSet(6, 7, 8, 9)



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