1.x: Feature Request Observable.firstOrDefaultSingle

[vanniktech]

How do you guys feel about an overload that is named something along the lines of Observable.firstOrDefaultSingle and basically does the same as Observable.firstOrDefault with the difference of returning a Single<T> instead of Observable<T>?

Edit: Could also maybe be called firstOrDefaultAsSingle

[akarnokd]

What's wrong with firstOrDefault().toSingle() ?

[JakeWharton]

Or switchIfEmpty().toSingle() for async defaults.

[vanniktech]

Nothing is wrong with that, I'm right now using firstOrDefault().toSingle().

[JakeWharton]

I don't like that it conflates two concepts: taking the empty stream and ensuring it's non-empty but also transforming the type from Observable to Single.

[vanniktech]

Closing since if this type of suggestion would be approved (basically transforming Observable in any way into one that only emits one item and then converts itself into Single a lot of other operators would need to get the asSingle matching method e.g. first(), last(), lastOrDefault() for consistency