First class functions. Beyond the pure function ideal, in actual coding practice functional programming hinges on first class functions. A first class function is a function that is treated as a ...

M4N asks:. Is there a reason why functions in most(?) programming languages are designed to support any number of input parameters but only one return value?

If you want to master functional programming, the best place to start is with the Java Function interface.This example will show you four different ways to implement this functional interface in your ...