Scala Stack diff() method with example

Last Updated : 03 Nov, 2019

In Scala Stack class, the diff() method is used to find the difference between the two stacks. It deletes elements that are present in one stack from the other one.

Method Definition: def diff[B >: A](that: collection.Seq[B]): Stack[A]

Return Type: It returns a new stack which consists of elements after the difference between the two stacks.

Example #1:

// Scala program of diff()  
// method  
  
// Import Stack  
import scala.collection.mutable._
  
// Creating object  
object GfG  
{  
  
    // Main method  
    def main(args:Array[String])  
    {  
      
        // Creating stacks   
        val s1 = Stack(1, 2, 3, 4, 5)   
            
        val s2 = Stack(3, 4, 5)   
            
        // Print the stack  
        println("Stack_1: " + s1)  
            
        println("Stack_2: " + s2)  
            
        // Applying diff method   
        val result = s1.diff(s2)   
            
        // Displays output   
        print("(Stack_1 - Stack_2): " + result) 
    }  
}  

Output:

Stack_1: Stack(1, 2, 3, 4, 5)
Stack_2: Stack(3, 4, 5)
(Stack_1 - Stack_2): Stack(1, 2)

Example #2:

// Scala program of diff()  
// method  
  
// Import Stack  
import scala.collection.mutable._
  
// Creating object  
object GfG  
{  
  
    // Main method  
    def main(args:Array[String])  
    {  
      
        // Creating stacks   
        val s1 = Stack(1, 2, 3, 4, 5)   
            
        val s2 = Stack(3, 4, 5, 6, 7, 8)   
            
        // Print the stack  
        println("Stack_1: " + s1)  
            
        println("Stack_2: " + s2)  
            
        // Applying diff method   
        val result = s2.diff(s1)   
            
        // Displays output   
        print("(Stack_2 - Stack_1): " + result) 
    }  
}  

Output:

Stack_1: Stack(1, 2, 3, 4, 5)
Stack_2: Stack(3, 4, 5, 6, 7, 8)
(Stack_2 - Stack_1): Stack(6, 7, 8)

Scala Set diff() method with example

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Scala Stack diff() method with example

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