Does acceptinga a handler instead of returning a result have a name?

Question

def create() -> sock.sock:
    ...
    return sock

def create_(func: callable)-> None:
    ...
    func(sock)
    return

What are the names of those two interfaces between* a socket creator and code using that socket?

Perhaps touch on situations in which one considerably more appropriate.

_{* - sockets are just an example application}

Answer 1

With respect to functional programming, I think the term you may be looking for is continuation-passing style. This is contrasted with returning a result directly like in your first example.

Answer 2

In your code example, func is commonly called a callback function.

As far as I'm aware, there's no real name for the method itself, other than describing it as using a callback function. Continuation methods fill the same functional requirement but their implementation is conceptually different.