In Scala's functional programming, you are allowed to pass functions as parameters and even return a function as a result from another function; this defines what are called higher-order functions.
Let's demonstrate this feature by an example. Consider the following function testHOF that takes another function func and then applies this function to its second argument value:
object Test { def main(args: Array[String]) { println( testHOF( paramFunc, 10) ) } def testHOF(func: Int => String, value: Int) = func(value) def paramFunc[A](x: A) = "[" + x.toString() + "]"}
After demonstrating the basics of Scala's functional programming, now we are ready to move to more complex cases of functional programming. As mentioned earlier, ...
