Scala Map transform() method with example

The transform() method is utilized to transform the elements of the map into a mutable map.

Method Definition: def transform(f: (K, V) => V): Map.this.type

Return Type: It transforms all the elements of the map and returns them into a mutable map.

Example #1:

// Scala program of transform()
// method

// Creating object
object GfG
{

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

        // Creating a map
        val m1 = Map(3 -> "geeks", 4 -> "for", 2 -> "cs")

        // Applying transform method
        val result = m1.transform((key,value) => value.toUpperCase)

        // Displays output
        println(result)

    }
}

Output:

Map(3 -> GEEKS, 4 -> FOR, 2 -> CS)

Example #2:

// Scala program of transform()
// method

// Creating object
object GfG
{

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

        // Creating a map
        val m1 = Map(3 -> "geeks", 4 -> "for", 4 -> "for")

        // Applying transform method
        val result = m1.transform((key,value) => value.toUpperCase)

        // Displays output
        println(result)

    }
}

Output:

Map(3 -> GEEKS, 4 -> FOR)