mhijack

struct Book {
    var name: String
}

class BookStore: ObservableObject {
    @Published var books: [Book] = [Book(name: "The Great Influenza")]
    
    public func addBook(name: String) {
        self.books.append(Book(name: name))
    }

mhijack

struct ContentView: View {
    @State var dataStore = ["A", "B", "C"]
    
    var body: some View {
        HStack {
            ChildViewA(characters: dataStore)
            
            Spacer()
            
            ChildViewB(characters: dataStore)

mhijack

struct ContentView: View {
    @State private var cannotProceed = false
    
    var body: some View {
        VStack {
            Button("Toggle cannotProceed") {
                cannotProceed.toggle()
            }
            
            Button("Proceed") {

mhijack

import Combine

class LoginViewModel {
    public var username = CurrentValueSubject<String, Never>("")
    public var password = CurrentValueSubject<String, Never>("")
    public var confirmPassword = CurrentValueSubject<String, Never>("")
    
    public var isValid = false {
        didSet {
            print("Inputs are valid: \(isValid)")

mhijack

import Combine

publisher1.combineLatest(publisher2)

mhijack

import Combine

let integerConvertSubject = PassthroughSubject<String, Never>()
let integerConvertSubscription = integerConvertSubject
    .compactMap({ value in
            // Int initializer returns an optional
        return Int(value)
    })
    .sink { value in
        print("value came out of compact map: \(value)")

mhijack

import Combine

let subscription1 = [0, 1, 1].publisher
    .removeDuplicates()
    .sink { value in
        print(value)
    }

// 0
// 1

mhijack

import Combine

let intList = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
intList.publisher
    .filter({ $0 % 2 == 0 })
    .map({ String("Received integer: \($0)") })
    .sink { result in
        print(result)
    }

mhijack

import Combine

class MapDemo {
    var text: String = "" {
        didSet {
            print(text)
        }
    }
}

mhijack

import Combine

let currentvalue = CurrentValueSubject<Int, Never>(0)
print(currentvalue.value) // prints: 0
currentvalue.value = 10
print(currentvalue.value) // prints: 10

let currentvalueSubscription = currentvalue.sink { value in
    print(value)
}