[seanmcdirmid]

Right. You do it yourself in Rx, including the topological sort needed for glitch-free re-evaluation and whatever other features you need. Is there is a meta protocol to dissect event streams to reason about there sources? How does switching work? If you read an FRP paper, say Leo's flapjax one (which is still only kind of FRP), you see all the complexity needed to support those features; no wonder Rx didn't bother.

[mattpodwysocki]

There were definite tradeoffs to make while we were designing Rx and that was certainly one of them. Since we don't want to have to check if the stream is the same stream, instead of saying:

stream1.combine(stream1.skip(1), ...)

We encourage since it is the same stream to use zip to avoid glitches and keep our overall memory footprint low:

stream1.zip(stream1.skip(1), ...)