This is the presentation for Composing Events with RxJS an Alt.Net Melbourne Lightning Talk.

Reactive Extensions

• Reactive Extensions for JavaScript.
• There is also Reactive Extensions for C#.
• Reactive Extensions come from Microsoft Labs.

What is IEnumerable?

• Provides Enumerator, allows lazy evaluation
• You can implement an IEnumerable with yield and yield break.

What is Observable?

• When you foreach(..) through IEnumerable you are waiting OnNext.
• With Observable you are notified OnNext.

What is Rx

• Like Linq adds a generic common API to query, Rx attempts to add a common API to compose generic events.
• There are Select, Where, Join, Zip, Merge and many other constructs.
• Basically keeps track of events and callbacks.
• RxJs provides integration with several frameworks.
• Also provides common error handling, which I won't show.

Next (lets see some code!)

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