firstclassfunctions.scala

firstclassfunctions.scala

// Simplest way to create a function
def f1(value: Int) = 4 * value            //> f1: (value: Int)Int
	
// And call
f1(4)                                     //> res0: Int = 16

// and save it in a val
val valuef1 = f1 _                        //> valuef1  : Int => Int = <function1>
	
//and call it from the val
valuef1(40)                               //> res1: Int = 160
	
// Another way to create a function
val valueAnoFun = (x: Int) => 5 * x       //> valueAnoFun  : Int => Int = <function1>
	
// call the function
valueAnoFun(43)                           //> res2: Int = 215
	
// passing our function to the list map function as a parameter
List(1,2,3,4) map valueAnoFun             //> res3: List[Int] = List(5, 10, 15, 20)