Single<String> requires two flatMapCompletable calls to convert to string

[ersin-ertan]

I tried to solve this problem on stack overflow that deals with:
"Chaining RxJava observables with callbacks/listeners"

I found that two flatMapCompletable calls were required to go from Single<String> to String.

Shouldn't the first flatMapCompletable be able to get the string?
See gist for full anonymous class example

@artem-zinnatullin - Artem comments on one of the solutions
@vanniktech - implmented 1.x: Single.flatMapCompletable#4226

[JakeWharton]

The first map produces a Single<Single<String>>. Did you mean flatMap?

[ersin-ertan]

Correct, thank you. Code examples have been revised.