let _ = Just(10)
    .map { value -> String in
        return "a string"
    }
    .sink { receivedValue in
        print("The end result was \(receivedValue)")
    } // AnyCancellable

let _ = Just(5)
    .map { value -> String in
        switch value {
        case _ where value < 1:
            return "none"
        case _ where value == 1:
            return "one"
        case _ where value == 2:
            return "couple"
        case _ where value == 3:
            return "few"
        case _ where value > 8:
            return "many"
        default:
            return "some"
        }
    }
    .sink { receivedValue in
        print("The end result was \(receivedValue)")
    }