Scala Product Map Values
In Scala the product of the map elements can be done by utilizing foldLeft method.
Syntax: m1.foldLeft(1)(_*_._1)
Here, m1 is used for a Map, foldLeft is a method that takes an initial value one for product. it will take previous result and multiply it to the next map key value. * and use 1 for the initial value to get the product of values.
Return Type: It returns the product of all the elements of the map.
Example #1:
// Scala program of product() // method // Creating object object GfG { // Main method def main(args : Array[String]) { // Creating a map val m 1 = Map( 3 - > "Beginner" , 2 - > "for" , 4 - > "for" ) // Applying product method val result = m 1 .foldLeft( 1 )( _ * _ . _ 1 ) // Displays output println(result) } } |
Output:
24
Here, one in the foldLeft method is the initial value.
Example #2:
// Scala program of product() // method // Creating object object GfG { // Main method def main(args : Array[String]) { // Creating a map val m 1 = Map( 3 - > "Beginner" , 4 - > "for" , 4 - > "for" ) // Applying product method val result = m 1 .foldLeft( 1 )( _ * _ . _ 1 ) // Displays output println(result) } } |
Output:
12