Rx API in depth: Hot and Cold observables
- Posted: Dec 14, 2009 at 7:46 AM
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In this episode of the Rx API in depth, Wes talks talks about hot and cold Observables.
Visit the Reactive Extensions DevLabs page to download and learn more about Rx.
Visit the Reactive Extensions DevLabs page to download and learn more about Rx.
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I'm amazed there don't appear to be any so-called early-access / alpha books on Rx coming from Manning or APress. At least they're not listed yet. I'd really like to find something longer than 'just' a couple of blog postings that really digs into specifically Rx and reactive programming in general in .NET. These videos are great and I'm very grateful they're being make available, however for study purposes nothing beats the one-to-one, deep dive that the printed word delivers. Does anyone know when we might see a Rx book?
That is one of my new year's resolutions.
I'm curious, what is the origin of the terms "hot" and "cold?" Were other terms considered like "static" vs. "dynamic," or "immutable" vs. "mutable?"
Hot = Running
Cold = Not Running
Static/Dynamic would be misleading. Immutable/Mutable is also misleading. Perhaps, the closest terms are Deferred / Not-Deferred or Latent / Active.
The terms Hot and Cold came from whiteboarding and design sessions where we needed a term to describe the difference between something that running versus something that represents a thing that can be run. We definitely didn't sit down and figure out a vocabulary, these things just happen. I'm sure that at some point in time people will think about standard terminology, but we usually can't wait for that to happen.
As Wes mentioned above, I like to think of them as
Hot = Active
Cold = Passive.
I think we can do better than the explanation JVG gives here.
Ok instead of being part of the problem I thought I would put my 2c in.
Here is my post on Hot vs Cold Observables.
http://leecampbell.blogspot.com/2010/08/rx-part-7-hot-and-cold-observables.html
This is a very nice site.I like it very much!
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