leaky.swift

class ViewController: UIViewController {
    @IBOutlet weak var cardImageView: UIImageView!
    let disposeBag = DisposeBag()
    let divider = 100
    deinit {
        print("deinit vc")
    }
    override func viewDidLoad() {
        super.viewDidLoad()

        ExampleRepository.shared.getSomething()
            .flatMapLatest({ (value) -> Observable<Int> in
                return .just(value % self.divider)
            })
            .map { (value) -> Int in
                return value % self.divider
            }
            .subscribe(onNext: { value in
                print(value)
            })
            .disposed(by: disposeBag)
    }
}

class ExampleRepository {
    static let shared = ExampleRepository()
    
    let dates = BehaviorRelay<Int>(value: Int(Date().timeIntervalSince1970))
    
    func getSomething() -> Observable<Int> {
        return dates.asObservable()
    }
}