Learn the benefits Observables can provide when you are developing complex web applications.
While a Promise represents a value to be resolved in future, an Observable represents a stream of values throughout. An Observable may be completed, which means it won’t emit any further values. An Observer subscribes to these Observables. These Observers are essentially callbacks to emissions of the Observable. This paradigm supports asynchronous operations naturally. In our application, the Angular 2 components have functions which act as Observers, while the data-sharing service can act as an Observable.
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