In Scala Stack class, the count() method is utilized to count the number of elements in the stack that satisfies a given predicate.
Method Definition: def count(p: (A) => Boolean): Int
Return Type: It returns the count the number of elements in the stack that satisfies a given predicate.
Example #1:
// Scala program of count() // method // Import Stack import scala.collection.mutable._ // Creating object object GfG { // Main method def main(args:Array[String]) { // Creating a stack val s1 = Stack(1, 2, 3, 4, 5) // Print the stack println(s1) // Applying count method val result = s1.count(z => true) // Displays output print("Number of element in stack: " + result) } } |
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Output:
Stack(1, 2, 3, 4, 5) Number of element in stack: 5
Example #2:
// Scala program of count() // method // Import Stack import scala.collection.mutable._ // Creating object object GfG { // Main method def main(args:Array[String]) { // Creating a stack val s1 = Stack(1, 2, 3, 4, 5) // Print the stack println(s1) // Applying count method val result = s1.count(z => {z % 2 == 0}) // Displays output print("Number of element in stack divisible by 2: " + result) } } |
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Output:
Stack(1, 2, 3, 4, 5) Number of element in stack divisible by 2: 2
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