Basics of Combine

comb8.swift

subject
        .handleEvents(
           receiveSubscription: { (subscription) in
                print("Received a subscription: \(subscription)")
        }, receiveOutput: { (output) in
            print("Received an output: \(output)")
        }, receiveCompletion: { (completion) in
            switch completion {
            case .finished:
                print("Finished with success")
                    
            case .failure(let error):
                print("Finished with an error \(error)")
            }
        }, receiveCancel: {
            print("Received a cancel")
        })