Technical Architect Brain

Scala Example: Function Composition

In scala, functions can be composed from other functions. It is a process of composing in which a function represents the application of two composed functions.

Let's see an example.

1. object MainObject {  
2.    def main(args: Array[String]) = {  
3.      var result = multiplyBy2(add2(10))      // Function composition  
4.      println(result)  
5.     }  
6.     def add2(a:Int):Int = {  
7.         a+2  
8.     }  
9.       
10.     def multiplyBy2(a:Int):Int = {  
11.         a*2  
12.     }  
13. }