Scala Map copyToArray() method with example

Last Updated : 13 Aug, 2019

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)  
    } 
} 