Enhancing user experiences with reactive extensions tccc10
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The document introduces Reactive Extensions (Rx) which allows composing and operating on streams of events over time using LINQ operators similar to how you would with lists. It discusses key Rx concepts like IObservable which pushes events to observers compared to IEnumerable which pulls items, marble diagrams for visualizing streams, and how LINQ queries work the same on streams with additional time-based operators like throttle, delay, buffer. The document encourages questions and provides contact details for the author.
Enhancing user experiences with reactive extensions tccc10
- 1. Enhancing User Experiences With Reactive ExtensionsBryan Anderson
- 2. What is Rx?Reactive Extensions are a set of extension methods that allow you to compose and operate on streams with LINQ operators in the same way you would a list.
- 3. Compose and operate on streams? Sounds like it’s time for me to take a nap.
- 4. Streams?A stream can be thought of as a list of events that take place over time.
- 5. Compose?Sticking functions together, like Legos. Say we have two functions f and g.Math: f(g(x))Unix: x | g | f
- 6. What is Rx?Reactive Extensions are a set of extension methods that allow you to compose and operate on streams with LINQ operators in the same way you would a list.
- 7. It’s too early to think abstractly and a nap sounds really good right now.
- 8. IObservable vs IEnumerableIObservable and IEnumerable are mathematical duals. Which just means they’re equivalent. Every IEnumerable could be turned into an IObservable and vice-versa (with enough time).
- 9. If they’re equivalent what does IObservable give us?
- 10. IObservable vs IEnumerableIEnumerable let’s you pull items from it.IObservable pushes items to you.
- 11. IObservable vs IEnumerableWhen it comes down to itIObservable = IEnumerable + Time
- 12. Marble DiagramsRunning observable:Completed normally:Completed with an exception:Input goes above output:
- 13. I think you’ve lost your marbles.
- 14. Questions so far?Please feel free to ask questions as we go.
- 15. The LINQ you’re used toCommon LINQ queries work the sameSelectWhereFirstSkipTake
- 16. Time adds more optionsThrottleDelayBufferWithTime, BufferWithCountScanZip, Merge, CombineLatest
- 17. Dude, this is a CODE camp. You need to stop talking and show me some code!
- 18. Questions?I love feedback!Bryan Andersonbryan.anderson@ilmservice.com@SolaAesir
Editor's Notes
- #4: I knew I shouldn’t have let my snarky audience member personality add his own slides…
- #5: Where Rx is concerned a stream is anything that implements IObservable.
- #17: Scan == Accumulate with intermediate values kicked out
- #18: Stuff I didn’t get to make examples forPub/SubTestingSynced Observable Collections