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Exploring Different Data Observers and Use Cases with Code 1. Protocol/Delegate Pattern: 🔍 Understanding the Scenario: Suppose we have a scenario where we need to notify a ViewController whenever a new item is added to a shopping cart. We'll use the protocol/delegate pattern to achieve this. 📝 Protocol Definition: protocol ShoppingCartDelegate: AnyObject { func didAddItemToCart(itemName: String) } 🛒 Shopping Cart Class: class ShoppingCart { weak var delegate: ShoppingCartDelegate? func addItemToCart(itemName: String) { // Add item to cart logic delegate?.didAddItemToCart(itemName: itemName) } } 👩‍👧‍👦 View Controller Implementation: class ViewController: UIViewController, ShoppingCartDelegate { let shoppingCart = ShoppingCart() override func viewDidLoad() { super.vie...

Comparing Filter, Map, and Find in Swift and JavaScript In this blog post, we'll explore how to use three fundamental array methods, filter , map , and find , in both Swift and JavaScript. We'll compare the shorthand notation ( $0 , $1 , etc.) used in Swift with the named parameter notation for increased clarity and readability. Filter in Swift: let numbers = [1, 2, 3, 4, 5] // Using $0 shorthand notation let evenNumbers = numbers.filter { $0 % 2 == 0 } // Output: [2, 4] // Using named parameter notation let oddNumbers = numbers.filter { number in return number % 2 != 0 } // Output: [1, 3, 5] Filter in JavaScript: const numbers = [1, 2, 3, 4, 5]; // Using anonymous function const evenNumbers = numbers.filter(num => num % 2 === 0); // Output: [2, 4] // Using named function const oddNumbers = numbers.filter(function(num) { return num % 2 !== 0; }); // Output: [1, 3, 5] Map in Swift: let numbers...