Hi @m_ster, are you asking for a different example than the one I used in the book, or for help to better understand how flatMap works?
getting the following error for challenge on xcode 9:
file:///Users/pauluhn/Rx/challenge/Challenge1-Finished/RxSwift.playground: error: Playground execution aborted: error: Execution was interrupted, reason: EXC_BAD_ACCESS (code=EXC_I386_GPFLT).
The process has been left at the point where it was interrupted, use “thread return -x” to return to the state before expression evaluation.
This tutorial is more than six months old so questions are no longer supported at the moment for it. We will update it as soon as possible. Thank you! :]