Scala and Spark for Big Data Analytics

Function as a return value

As mentioned, higher-order functions also support returning a function as a result. Let's demonstrate this by an example:

def transferMoney(money: Double) = {  if (money > 1000)    (money: Double) => "Dear customer we are going to add the following                        amount as Fee: "+money * 0.05  else    (money: Double) => "Dear customer we are going to add the following                        amount as Fee: "+money * 0.1} val returnedFunction = TransferMoney(1500)returnedFunction(1500)

The preceding code segment will produce the following output:

Dear customer, we are going to add the following amount as Fee: 75.0

Let's run the previous example as shown in the following screenshot; it shows how to use the function as a return value:

Figure 7: Function as a return ...