rxjs5

I have a method that needs to wait for an observable to finish. I know observable are great for returning single pieces of data over time but I need to know when this observable has completely finished returning all of its data so I can run validation code on the object it has returned. The method getCustom subscribes to an observable run on the supplied url which then returns the observable. I am not too sure if this is the best way to approach this situation so I would appreciate if anyone could give me any advice or a direction to handle this. private validateQuoteRetrievalAnswers(reference

Let's say I have two classes, where you can observe over some observables. First example, with public subject: class EventsPub { public readonly onEnd = new Subject<void>(); } Second example, with private subject and registering method: class EventsPriv { private readonly endEvent = new Subject<void>(); public onEnd(cb: () => void): Subscription { return this.endEvent.subscribe(cb); } } The first example is somehow unsafe because anyone can call eventsPub.endEvent.next() from outside the class and introduce side effects, however, comparing to example 2 It allows for pipes, which is a big plus

So a quick question. I've been using RxJS 5 for a few months now, and I've run into a bit of behavior that I don't really understand, as I haven't been able to look it up anywhere. I'm in a situation where subscribing to an observable chain with simply .subscribe(); doesn't trigger the observable. However, if I add an onNext callback (empty or not), the observable triggers, and the chain processes: .subscribe(() => {}); Can anyone explain why this behavior happens? EDIT2 - Removed irrelevant example .subscribe() actually doesn't require any parameters, it will just create an emptyObserver if

I'm reading the rxjs manual, I'm a little confused about what's the difference between multicast and publish operators. They seem very similar. I had the same question when reading http://reactivex.io/rxjs/manual/overview.html . So to make it clear, .publish() is just shorthand for .multicast(new Rx.Subject()) (and publishBehavior , publishLast , and publishReplay are similar but instantiate BehaviorSubject , AsyncSubject and ReplaySubject respectively). They are indeed very similar, and they have a history that makes it even more confusing. In simple terms, publish is a special case of

Basically I'm trying to inflate BehaviorSubject<[]> with array of data which will be loaded in chunks. BehaviorSubject<[]> will be added with new chunk of data (like Array.push ) but I don't want to use another array to store and add to BehaviorSubject.next because this will cause rendering to take too long as the data grow over time. Any suggestion? You can use getValue() method to achieve what you want to do. Example: data = new BehaviorSubject<any[]>([]); addData(foo:any):void{ // I'm using concat here to avoid using an intermediate array (push doesn't return the result array, concat does).

I'm getting started with RxJs (using the v5 beta), but somehow I can't figure out how to work with distinctUntilChanged . The output from the code below if I run it in babel-node is [ 'a', 1 ] { key: 'a', state: 1 } Next: { value: 42 } Completed That is not what I would expect. Why is only one entry passing distinctUntilChanged ? I would expect the output to be [ 'a', 1 ] [ 'a', 0 ] [ 'a', 1 ] { key: 'a', state: 1 } { key: 'a', state: 2 } { key: 'a', state: 0 } { key: 'a', state: 1 } Next: { value: 42 } Next: { value: 24 } Completed Here's the code import {Observable} from 'rxjs' Observable.of

I'm able to create 2 observables to watch mouse move and click events as such: var mousemove$ = Rx.Observable.fromEvent(document, 'mousemove'); var click$ = Rx.Observable.fromEvent(document, 'click'); I'm also able to use merge() and debounceTime() to wait for either mousemove or click to not happen for 10 seconds like this: var allactivity$ = Rx.Observable.merge( mousemove$.mapTo('Mouse!'), click$.mapTo('Click!') ); var lastact$ = allactivity$.debounceTime(10000); However, I would like to somehow construct an observable for when a user Re-starts either moving the mouse or clicking after this