June 2015
Intermediate to advanced
182 pages
3h 56m
English
Content preview from Learning Reactive Programming With Java 8Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Accumulating data
The scan(Func2) operator takes a function with two arguments as a parameter. Its result is an Observable instance. The first item, emitted by the result of the scan() method, is the first item of the source Observable instance. The second item emitted is created by applying the function that was passed to the scan() method on the previous item emitted by the result Observable instance and the second item, emitted by the source Observable instance. The third item, emitted by the scan() method result, is created by applying the function, passed to the scan() method to the previous item, emitted by it and the third item emitted by the source Observable instance. This pattern continues in order to create the rest of the sequence ...
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