Scala Map count() method with example

The count() method is utilized to count pair of keys in the Map.

Method Definition: def count(p: ((A, B)) => Boolean): Int

Return Type: It returns the number of keys present in the map that satisfies the given predicate.

Example #1:

// Scala program of count()
// method

// Creating object
object GfG
{

    // Main method
    def main(args:Array[String])
    {

        // Creating a map
        val m1 = Map("geeks" -> 5, "for" -> 3, "cs" -> 5)

        // Applying count method
        val result = m1.count(z=>true)

        // Displays output
        println(result)

    }
}

Output:

3

Example #2:

// Scala program of count()
// method

// Creating object
object GfG
{

    // Main method
    def main(args:Array[String])
    {

        // Creating a map
        val m1 = Map("geeks" -> 5, "for" -> 3, "geeks" -> 5)

        // Applying count method
        val result = m1.count(z=>true)

        // Displays output
        println(result)

    }
}

Output:

2

So, the identical keys are counted only once.