Java.util.function.Function

External

• https://docs.oracle.com/javase/8/docs/api/java/util/function/Function.html

Internal

• Java 8 Lambda Expressions

Overview

@FunctionalInterface
public interface Function<I, O> {

    O apply(I input);

    ....
}

Primitive Type Functions

• IntFunction<T> a function that receives an int argument and returns an argument of type T.
• ToIntFunction<T> a function that receives an argument of type T and returns an int.

Composition Methods

• andThen(Function)
• compose(Function)