Edudjr

enum AsyncError: Error {
    case finishedWithoutValue
}

extension AnyPublisher {
    func async() async throws -> Output {
        try await withCheckedThrowingContinuation { continuation in
            var cancellable: AnyCancellable?
            var finishedWithoutValue = true
            cancellable = first()

Edudjr

struct API {
    //...
    func loadTodo() -> AnyPublisher<Todo, Error> {
        //...
    }
}

class Client1 {
    // 1. Make function async
    func loadTodo() async {

Edudjr

extension AnyPublisher {
    func async() async throws -> Output {
        try await withCheckedThrowingContinuation { continuation in
            var cancellable: AnyCancellable?
            
            cancellable = first()
                .sink { result in
                    switch result {
                    case .finished:
                        break

Edudjr

struct API {
    let url = URL(string: "https://jsonplaceholder.typicode.com/todos/1")!

    func loadTodo() async throws -> Todo {
        let (data, _) = try await URLSession.shared.data(from: url)
        return try JSONDecoder().decode(Todo.self, from: data)
    }
}

class Client1 {

Edudjr

class Client1 {
    var cancellable: AnyCancellable?
    let api = API()
    
    func loadTodo() {
        cancellable = api.loadTodo()
            .sink(receiveCompletion: { result in
                switch result {
                case .finished:
                    print("finished")

Edudjr

struct API {
    let url = URL(string: "https://jsonplaceholder.typicode.com/todos/1")!
    
    func loadTodo() -> AnyPublisher<Todo, Error> {
        URLSession.shared.dataTaskPublisher(for: url)
            .map { $0.data }
            .decode(type: Todo.self, decoder: JSONDecoder())
            .eraseToAnyPublisher()
    }
}

Edudjr

//  Repository.swift
import Foundation

protocol Repository {
    associatedtype Model
    func get(id: String, completion: @escaping (Result<Model, Error>) -> Void)
    func save(_ item: Model, completion: @escaping (Result<Model, Error>) -> Void)
    func remove(_ item: Model, completion: @escaping (Result<Model, Error>) -> Void)
}

Edudjr

struct MusicSheetPlotter<T: Prototype> where T.CloneType: UIView {

    let quarterNote: T

    func plot(in view: UIView) {
        ...
        stack.addArrangedSubview(quarterNote.clone())
        stack.addArrangedSubview(quarterNote.clone())
        stack.addArrangedSubview(quarterNote.clone())
        ...

Edudjr

protocol Prototype {
    associatedtype CloneType
    func clone() -> CloneType
}

extension UILabel: Prototype {
    ...
    // Don't forget to specialise the return type!
    func clone() -> UILabel {
        UILabel(self)

Edudjr

struct MusicSheetPloter {
  let quarterNote: UIView & Prototype
  ...
}