zarochintsev

let singleton = Singleton.default

zarochintsev

class Singleton {
  static let `default` = Singleton()
  private init() {
  }
}

zarochintsev

#import "Singleton.h"

@implementation Singleton

+ (id)shared {
  static Singleton *shared = nil;
  static dispatch_once_t onceToken;
  dispatch_once(&onceToken, ^{
    shared = [[self alloc] init];
  });

zarochintsev

#import <Foundation/Foundation.h>

@interface Singleton : NSObject

+ (id)shared;

@end

zarochintsev

struct Car: Codable {
  let model: String
  let topSpeed: Int
  let url: URL
  
  enum CodingKeys: String, CodingKey {
    case model = "title"
    case topSpeed = "speed"
    case url = "link"
  }

zarochintsev

do {
  let car = try JSONDecoder().decode(Car.self, from: jsonData)
} catch {
  print("Unresolved error: \(error)")
}