In Scala Stack class
, the map() method is utilized to build a new stack by applying a function to all elements of the given stack.
Method Definition: def map[B](f: (A) => B): Stack[B]
Return Type: It returns a new stack containing all the elements after applying the given function.
Example #1:
// Scala program of map() // method // Import Stack import scala.collection.mutable. _
// Creating object object GfG
{ // Main method
def main(args : Array[String])
{
// Creating stack
val s 1 = Stack( 5 , 3 , 2 , 7 , 6 , 1 )
// Print the stack
println(s 1 )
// Applying map method
val result = s 1 .map(x => x*x)
// Display output
print( "New stack after squaring all elements: " + result)
}
} |
Output:
Stack(5, 3, 2, 7, 6, 1) New stack after squaring all elements: Stack(25, 9, 4, 49, 36, 1)
Example #2:
// Scala program of map() // method // Import Stack import scala.collection.mutable. _
// Creating object object GfG
{ // Main method
def main(args : Array[String])
{
// Creating stack
val s 1 = Stack( 1 , 3 , 2 , 7 , 6 , 5 )
// Print the stack
println(s 1 )
// Applying map method
val result = s 1 .map(x => x/ 2 )
// Display output
print( "New queue after dividing all elements by 2: " + result)
}
} |
Output:
Stack(1, 3, 2, 7, 6, 5) New queue after dividing all elements by 2: Stack(0, 1, 1, 3, 3, 2)