Scala Map count() method with example

Concatenate Two Maps in Scala

Last Updated : 13 Aug, 2019

The concatenation of Scala map is obtained by utilizing ++ operator. Syntax :

def ++(xs: Map[(A, B)]): Map[A, B]

Return Type: It returns a single map by concatenating two maps but it separates the identical keys. Example #1:

Scala

// Scala program of concatenating
// two maps

// Creating object
object GfG
{ 

    // Main method
    def main(args:Array[String])
    {
    
        // Creating the first map
        val m1 = Map("Nidhi" -> 23, "Rahul" -> 18) 
        
        // Creating the second map
        val m2 = Map("Geeta" -> 22, "Rahul" -> 18) 
        
        // Applying ++ operator
        val result = m1.++(m2)
        
        // Displays output
        println(result)
    
    }
}

Output:

Map(Nidhi -> 23, Rahul -> 18, Geeta -> 22)

As we can see in above example, we joined two maps by using ++ operator. Example #2:

Scala

// Scala program of concatenating
// two maps

// Creating object
object GfG
{ 

    // Main method
    def main(args:Array[String])
    {
    
        // Creating the first map
        val m1 = Map("geeks" -> 5, "for" -> 3) 
        
        // Creating the second map
        val m2 = Map("geeks" -> 5, "cs" -> 2) 
        
        // Applying ++ operator
        val result = m1.++(m2)
        
        // Displays output
        println(result)
    
    }
}

Output:

Map(geeks -> 5, for -> 3, cs -> 2)

Scala Map count() method with example

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