2019-03-17-rxswift-observable.swift

let disposeBag = DisposeBag()

func doSomethingRx() -> Observable<String> {
    return Observable.create { observer in
        observer.onNext("We're using RxSwift!")

        return Disposables.create()
    }
}

doSomethingRx()
    .subscribe(onNext: { result in
        print("result: \(result)")
    })
    .disposed(by: disposeBag)

// prints "result: We're using RxSwift!"