Scala Map copyToArray() method with example

The copyToArray() method is utilized in copying pair of keys of the Map to an Array.

Method Definition: def copyToArray(xs: Array[(A, B)]): Unit

Return Type: It returns the keys of the map to an array.

Example #1:

// Scala program of copyToArray()
// method

// Creating object
object GfG
{

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

        // Creating a map
        val m1 = Map("geeks" -> 5, "for" -> 3, "cs" -> 2)

        // Creating Array
        val x: Array[Any] = Array(0, 0, 0, 0, 0)

        // using 'copyToArray' method
        m1.copyToArray(x)

        // Displays keys copied in
        // the Array
        for(m2 <-x)
        println(m2)
    }
}

Output:

(geeks, 5)
(for, 3)
(cs, 2)
0
0

So, here the keys are copied to the array.
Example #2:

// Scala program of copyToArray()
// method

// Creating object
object GfG
{

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

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

        // Creating Array
        val x: Array[Any] = Array(0, 0, 0, 0, 0)

        // using 'copyToArray' method
        m1.copyToArray(x)

        // Displays keys copied in
        // the Array
        for(m2 <-x)
        println(m2)
    }
}

Output:

(geeks, 5)
(for, 3)
0
0
0

Here, the identical keys are removed.