Edudjr

import UIKit

class ViewControllerStack: UIViewController {
    private var firstContainerTopAnchor: NSLayoutConstraint?
    private var firstController: UIViewController?
    private var controllers: [UIViewController]?
    private var containerView = UIView()
    
    init(controllers: [UIViewController]) {
        self.controllers = controllers

Edudjr

//
//  ObservableTestTests.swift
//  ObservableTestTests
//
//  Created by Eduardo Domene Junior on 01/12/19.
//  Copyright © 2019 Eduardo Domene Junior. All rights reserved.
//

import XCTest
import Observable

Edudjr

//: A UIKit based Playground for presenting user interface
// based on: https://stackoverflow.com/questions/37967555/how-can-i-mimic-the-bottom-sheet-from-the-maps-app
// This example includes an autoresizing collapsed-view. 
// Clicking on "testing" will add another label, updating the collapsed-view's height.
// Click and drag the red section (BottomSheet) to update its position.

import UIKit
import PlaygroundSupport

let screenHeight: CGFloat = 400

Edudjr

import UIKit
import PlaygroundSupport

let screenHeight: CGFloat = 400
let screenWidth: CGFloat = 200

class InnerViewController: UIViewController {
    var stack: UIStackView = {
        var label: UILabel {
            let label = UILabel()

Edudjr

protocol Animal {
    var name: String { get }
    var age: Int { get }
    func makeNoise()
}

struct Dog: Animal {
    let name: String
    let age: Int
    

Edudjr

let myHorse = Horse(name: "Horsy", age: 5)
print(myHorse.name)
// Horsy

Edudjr

let animals: [Animal] = [
    Dog(name: "Doggy", age: 3),
    Horse(name: "Horsy", age: 5)
]

let pages = animals.map { PageDetails(animal: $0) }

let listView = ListView(pages: pages, animals: animals)

Edudjr

// Composition root
let animals: [Animal] = [
    Dog(name: "Doggy", age: 3),
    Horse(name: "Horsy", age: 5)
]

let pageDetails = PageDetails()

let vc = ListView(pageDetails: pageDetails, animals: animals)

Edudjr

struct AnimalReport {
    let animal: Animal
    func describe() {...}
}
struct AnimalSelection {
    let animals: [Animal]
    let animalReport: AnimalReport
    func selectAnimal(_ animal: Animal) {...}
}
let animals: [Animal] = [

Edudjr

struct AnimalReport {
    var animal: Animal?
    func describe() {
        guard let animal = animal else { return }
        print("Animal is called \(animal.name) and is \(animal.age) years old")
    }
}

struct AnimalSelection {
    let animals: [Animal]