Scala Stack diff() method with example

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)