Convert Observable<Single<Object>> to Single<List<Object>>

Question

Is there a possibility to convert Observable<Single<Object>> to Single<List<Object>> ? I'd also like to know whether it's possible to make the observable to wait for all the underlying singles to complete.

Answer 1

I imagine you could do it with something like this (untested):

myObservable
    .flatMap(x -> x)    // Flatten to Observable<Object>
    .toList()           // Collect in an Observable<List<Object>>
    .single();          // Convert to Single