February 2020
Intermediate to advanced
412 pages
9h 36m
English
Content preview from Learning RxJava - Second Edition
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The Observable
As introduced in Chapter 1, Thinking Reactively, the Observable class is a push-based composable iterator. For a given Observable<T>, it pushes items (called emissions) of type T through a series of operators until they finally arrive at a final Observer, which consumes them. We will present several ways of creating an Observable, but first, let's dive into how an Observable works through its onNext(), onCompleted(), and onError() calls.
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