Generalized Publish family of operators - Can't mumble anonymous types

Question

One problem with this new approach (for Prune & Publish, Replay etc)

xs.CombineLatest(ys, (x,y) => new{x,y}).Publish(new Subject<?>(), ...)

This with the specialized versions of Publish, Prune & Replay this was possible.

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James Miles http://enumeratethis.com

Answer 1

Hi James,

With the new model it is easy to create extension methods to provide replacement functionality, e.g.:

    public static IObservable<T> PublishReplay<T>(this IObservable<T> source)
    {
      return source.Publish(new ReplaySubject<T>());
    }

I do like the new ability to substitute different types of ISubject into Publish/Multicast.

One question though is whether the Rx "language" should incorporate some specific ISubject behaviours as well as the "routing" semantics of Publish. If not, then maybe Prune & Replay need to appear in a community contribution library, as valuable ways to solve a specific problem.

Answer 2

>I do like the new ability to substitute different types of ISubject into Publish/Multicast.

I agree, it's more flexible.

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James Miles http://enumeratethis.com

Answer 3

Would it be useful to have factory methods since these can use type inference?

Answer 4

I was thinking something like that, or if you're adding back the Prune/Replay/Publish methods it might not be a problem.

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James Miles http://enumeratethis.com

Answer 5

In that case, we would probably just have Prune/Replay/Publish.

Otherwise, we would need to replace/augment every constructor with a factory method so that types can be properly inferred.