The Java Function interface is quite simple. It takes a single Java object as an argument, and returns a single Java object when the method concludes. Any method you can conjure up takes an object and ...

Python, JavaScript & C++ examples - Void function, Functions in Programming that require or return a Value discussed in brief for beginners.

For the types of functions you're talking about (ie. functions that return multiple values, of different types) I see it slightly differently than you seem to: I see the need/use of out params as ...