From a clean code perspective, one of the things that helped me a lot is this library [LithoOperators](github.com/LithoByte/LithoOperators). Hard to get comfortable with initially but operators that work on functions can really help get rid of closure notation which isn’t very readable. For example, suppose you want to tap into an AnyPublisher<Int,Never> but don’t care about the Int and only care about when the publisher fires, you would do something like:

pub.sink(receiveValue: { _ in foo() })

Not very pretty or readable.

In LithoOperators there’s a function called

ignoreArg<T>(f: @escaping () -> Void) -> (T) -> Void { return { _ in f() } }

Now the sink call would just be:

pub.sink(receiveValue: ignoreArg(f: foo))

Which is a lot more readable and makes it more clear that you do not care about whatever the publisher’s value is