2.x: switchMapSingle and switchMapCompletable

[tomaszpolanski]

Hey,

the addition of flatMapSingle/flatMapCompletable made the usage of Single and Completable way nicer in RxJava 2.
Do you consider adding switchMapSingle/switchMapCompletable to RxJava 2 as well?

Cheers

[akarnokd]

You mean 1.x? I have no plans for that and I don't want to keep 1.x alive for too long. I'd like to stop enhancing 1.x in 6 months and enter it into a bugfix-only mode. Otherwise 3rd party libraries may delay their upgrade way longer.

[vanniktech]

He wants switchMapSingle and switchMapCompletable for RxJava 2 just like there is flatMapSingle and flatMapCompletable

[tomaszpolanski]

@vanniktech exactly

[akarnokd]

Ah right. No plans for extending any other xMap operator

[vanniktech]

But then concatMap also needs the variants in order to be consistent. To be honest I forgot about those when proposing flatMapSingle / flatMapCompletable / flatMapMaybe initially - #4667

And then there's also Maybe. Plus Observable and Flowable are able of mapping so it's easily another 12 methods.

• Observable.switchMapSingle
• Observable.switchMapMaybe
• Observable.switchMapCompletable
• Observable.concatMapSingle
• Observable.concatMapMaybe
• Observable.concatMapCompletable
• Flowable.switchMapSingle
• Flowable.switchMapMaybe
• Flowable.switchMapCompletable
• Flowable.concatMapSingle
• Flowable.concatMapMaybe
• Flowable.concatMapCompletable

[tomaszpolanski]

If it is not on the roadmap because you don't want to add any more xMap operators, then I understand.

But if it is due to lack of the time, would you consider accepting contributions on the topic?

[akarnokd]

Sure, but these operators are not easy.

[tomaszpolanski]

Yes, I know, those are one of the hardest.
Still, I will at least have a look and see if I can deliver a PR.

Cheers!

[akarnokd]

Any progress on this?

[davidmoten]

I'm happy to have a look at this one if @tomaszpolanski doesn't have time at the moment.

[tomaszpolanski]

@davidmoten It would be great! My available time now is pretty limited.