TransformOnObservable vs AutoRefreshOnObservable + Transform?

[paagamelo2]

Ciao guys

Just wondering if the two operators are any different, or if they effectively behave the same. In case they're equivalent, is there any rule of thumb to follow when deciding which of the two to use?

Thanks
Lorenzo

[dwcullop]

They seem similar but are different. Which one you want depends on the specifics of the situation.

Use TransformOnObservable when the sub-observable fires the value that should be the result of the transformation. Each value from the sub-observable will trigger an Add/Update event in the downstream for the corresponding key.

Use AutoRefreshOnObservable + Transform when the refresh observable and the Transform don't have anything to do which each other. AutoRefreshOnObservable will trigger a Refresh event in the downstream, which will cause the Transform to be applied, but the Transform won't have any access to the value that the AutoRefreshOnObservable fired because it was translated into a refresh event.