This lesson introduces Reactive Programming using RxJS in simple terms, with a concrete example and no scary terminology.
How does the reduce function know that you've reached the end of the event stream?
Hi Brendan. A stream can emit 3 types of events: normal data to the next callback, errors to the error callback, and end of stream with the complete callback. This is how the reduce operator can conclude with one value: as soon as the source completes, it outputs the reduced value.
Observable.interval(400).take(9).map(...) is not explained. Why? Never mind the man behind the curtain?
4:21 - it should be 42, not 33.
Please get a microphone pop filter
This is such a great intro to the concept.