share-example.swift

let observable = Observable<Int>.create { observer -> Disposable in
  print("Creating observable")
  DispatchQueue.global(qos: .background).asyncAfter(deadline: .now() + 1, execute: {
    observer.onNext(2)
  }
  return Disposables.create()
}

let doubleObservable = observable.map { value -> Int in
  print("Multiplying by 2")
  return value * 2
}
let doubleSharedObservable = doubleObservable.share()

doubleSharedObservable.printNext("Subscription A")
doubleSharedObservable.printNext("Subscription B")