Summary
You learned to work with the Reactive extensions library, RxPHP. Reactive Programming is all about using Observables and Observers, which is similar to working with subscribers and publishers.
You learned how to use delay, defer, map, and flatMap, among other operators, and how to use a scheduler.
You also learned how to read an Apache log file and schedule it to read after every hour and how to work with RxPHP's PriorityQueue class.
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