Links

• Reactive Extensions: http://msdn.microsoft.com/en-us/data/gg577609
• homework: http://tinyurl.com/altnet-rx 
• Gist: http://gist.github.com/959367 
• RX Wiki: http://rxwiki.wikidot.com/observable-operators 
• mailto:rxfeedback@microsoft.com  
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Notes 

• nuget i Rx-All 
• generators: Observable.Create<int>(...)
• adapters:
• Observable.FromEvent<MouseEventArgs>(...)
• .FromEventPattern<MouseEventArgs>(frm, "MouseMove") <- uses reflection to find the event
• composition
• frm.MouseMove += (_, args) =>  { if (this) ... else if (that) ... } <- not composable
• Observable.FromEventPattern<>(...).Select(...) <-  specific events, logic not in action, actions composable
• crossing streams: Observable.___<>(...).SelectMany(evt => ...) 
• schedulers
• Observable.Timer(5.Seconds()) <- fires one event in 5 seconds
• Which timer? Up to you. Scheduler abstraction. 
• context + policy + clock
• distrib. process, you might use remote clock
• IScheduler <- mostly don't need to worry about. Use defaults: Observable.Range(1, 10, Scheduler.ThreadPool)
• Scheduler.Immediate, Scheduler.Dispatcher.... 
• Some of the schedulers are in different assemblies (if they depend on winforms, or whatever) for portability 
• TestScheduler (see below) 
• testing
• time problem
• want a virtual clock
• scheduler = new TestScheduler()
• scheduler.CreateObservable(OnNext(300, "wes"), OnNext(400, "ryan"), OnCompleted(500))
• results = scheduler.Run(...)
• results.AssertEqual(...) 
• debugging
• Use .Do to cause side effects (like Console.WriteLine) that you can observe to figure out what's going on 
• Other stuff
• .DistinctUntilChanged can de-dup an event stream
• .Timestamp makes T into Timestamped<T> which 
• Throttle: A----B--200ms----C -> A gets cancelled because B happened within throttle period 
• Challenges
• Challenge in learning Rx: there are a lot of operators 
• Path Forward
• Already on the Win7 Phone ROM
• Unstable releases every 3 weeks-ish right now 
• Stable releases: not as often, but supported, documentation, etc. .NET 4.0+, Silverlight 5, Win7 Phone
• Binaries and doc comments are redistributable
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