janodev

// BASIC SWITCH

enum Media { case Book }
extension Media : CustomStringConvertible
{ 
    var description: String {
        switch self {
            case .Book: return "bible"
        }

janodev

import UIKit
import PluggableApplicationDelegate

@UIApplicationMain
class AppDelegate: PluggableApplicationDelegate 
{
    override var services: [ApplicationService] {
        return [
            LoggerApplicationService()
        ]

janodev

import UIKit

public extension UIView {
    
    var autoLayout: AutoLayout {
        
        return AutoLayout(self)
    }
}

janodev

// Not App Store safe. Only available in real devices.

#define RTLD_LAZY  0x1
#define RTLD_NOW	0x2
#define RTLD_LOCAL	0x4
#define RTLD_GLOBAL	0x8

NSObject *voiceSynthesizer;
void *voiceServices;

janodev

{
    "global": {
        "check_for_updates_on_startup": true,
        "show_in_menu_bar": true,
        "show_profile_name_in_menu_bar": false
    },
    "profiles": [
        {
            "complex_modifications": {
                "parameters": {

janodev

#import <objc/runtime.h>
#import <Foundation/Foundation.h>


@interface Person : NSObject
@end
@implementation Person
@end

@interface Person(dynamicProperties)

janodev

import UIKit

// this one doesn’t require a helper function

var label: UILabel = {
    $0.backgroundColor = .blue
    $0.text = "This is a playground"
    $0.textColor = .white
    $0.textAlignment = .center
    return $0

janodev

#import <Foundation/Foundation.h>

@interface ObjC: NSObject
+ (BOOL)catchException:(void(^)(void))tryBlock error:(__autoreleasing NSError **)error;
@end

janodev

// From https://albertodebortoli.com/2018/03/12/easy-view-controller-unit-testing/

import XCTest
import UIKit

class ControllerLifecycle<T: UIViewController>
{
    private lazy var this = type(of: self).self
    private var rootWindow: UIWindow?
    var rootController: T? {

janodev

// I saw this trick in “Do you often forget [weak self], here is a solution”
// https://medium.com/anysuggestion/preventing-memory-leaks-with-swift-compile-time-safety-49b845df4dc6

import UIKit

class ViewController: UIViewController {
    
    // move this variable inside viewDidLoad to see it being released
    let downloader = Downloader()