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boudhayan / main.swift
Created August 13, 2022 09:54
import UIKit
let appDelegateClass: AnyClass = NSClassFromString("TestingAppDelegate") ?? AppDelegate.self
UIApplicationMain(CommandLine.argc,
CommandLine.unsafeArgv,
nil, NSStringFromClass(appDelegateClass))
@boudhayan
boudhayan / AppDelegate1.swift
Created August 13, 2022 09:50
import UIKit
class AppDelegate: UIResponder, UIApplicationDelegate {
var window: UIWindow?
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
print("--> Launching from \(type(of: self))")
window = UIWindow(frame: UIScreen.main.bounds)
@boudhayan
boudhayan / TestingAppDelegate.swift
Created August 13, 2022 09:46
import UIKit
@objc(TesingAppDelegate)
class TestingAppDelegate: UIResponder, UIApplicationDelegate {
var window: UIWindow?
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
print("--> Launching from \(type(of: self))")
window = UIWindow(frame: UIScreen.main.bounds)
@boudhayan
boudhayan / LaunchAppDelegate.swift
Created August 13, 2022 08:46
import UIKit
@main
class AppDelegate: UIResponder, UIApplicationDelegate {
var window: UIWindow?
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
print("--> Launching from \(type(of: self))")
window = UIWindow(frame: UIScreen.main.bounds)
@boudhayan
boudhayan / DependencyInjection.swift
Created May 11, 2022 14:26
// Without Dependency Injection
class Company {
var name: String
// `ceo` is dependency here, but Company initializes the ceo object,
// `Company` knows how to initilize the ceo
var ceo: Employee = Employee(name: "Steve", salary: 12344)
init(name: String) {
self.name = name
}
@boudhayan
boudhayan / protocol.swift
Created April 8, 2022 11:06
Protocol and Delegate
import Foundation
//MARK: Protocol
/*
protocol is a set of rules, whichever class adopts the protocol, needs to implement the variables and functions declared inside that protocol.
For the below protocol Car, it has two requirements, model and topSpeed.
So if any class or struct adopts this protocol, needs to implement model and topSpeed.
*/
protocol Car {
@boudhayan
boudhayan / AEMDictionary.swift
Last active September 30, 2020 03:15
protocol AEMValue { }
extension String: AEMValue { }
extension Int: AEMValue { }
struct AEMDictionary<T> {
private let container: [String: T]
init(_ dict: [String: T]) {
container = dict
@boudhayan
boudhayan / map-filter-reduce-flatmap.swift
Created May 5, 2020 18:02
//MARK: Custom Implmentation of map, filter, reduce, flatMap
public extension Array {
//map
func map2<T>(_ transform: (Element) -> T) -> [T] {
var mapped = [T]()
mapped.reserveCapacity(count)
for element in self {
mapped.append(transform(element))
}
return mapped
@boudhayan
boudhayan / Employee.swift
Created May 26, 2019 18:09
struct Employee {
let name: String
private var _employer: Company
var employer: Company {
mutating get {
if !isKnownUniquelyReferenced(&_employer) {
_employer = _employer.copy() as! Company
}
return _employer
@boudhayan
boudhayan / Company.swift
Created May 26, 2019 16:14
class Company: NSCopying {
var name: String = "Confidential"
func copy(with zone: NSZone? = nil) -> Any {
let copy = Company()
copy.name = name
return copy
}
deinit {