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Scala immutable TreeSet –() method

  • Last Updated : 19 Apr, 2020

In Scala immutable TreeSet class, the –() method is utilised to subtract elements of one TreeSet to another TreeSet.

Method Definition: def –(that: IterableOnce[A]): TreeSet[A]

Return Type: It returns a new TreeSet which contains the element from A – B TreeSets.

Example #1:




// Scala program of --() 
// method 
  
// Import TreeSet
import scala.collection.immutable._
  
// Creating object 
object GfG 
  
    // Main method 
    def main(args:Array[String]) 
    
      
        // Creating TreeSets
        val t1 = TreeSet("g", "e", "e", "k", "s"
          
        val t2 = TreeSet("a", "e", "i", "o", "u")
          
        // Print the TreeSets
        println(t1
          
        println(t2)
          
        // Applying --() method  
        val result = t1 -- t2
          
        // Display output 
        print("Combined TreeSet: " + result) 
           
    
Output:
TreeSet(e, g, k, s)
TreeSet(a, e, i, o, u)
Combined TreeSet: TreeSet(g, k, s)

Example #2:




// Scala program of --() 
// method 
  
// Import TreeSet
import scala.collection.immutable._
  
// Creating object 
object GfG 
  
    // Main method 
    def main(args:Array[String]) 
    
      
        // Creating TreeSets
        val t1 = TreeSet(1, 6, 3, 2, 5
          
        val t2 = TreeSet(2, 1, 5, 4, 1)
          
        // Print the TreeSets
        println(t1
          
        println(t2)
          
        // Applying --() method  
        val result = t1 -- t2
          
        // Display output 
        print("Combined TreeSet: " + result) 
           
    
Output:
TreeSet(1, 2, 3, 5, 6)
TreeSet(1, 2, 4, 5)
Combined TreeSet: TreeSet(3, 6)



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