Can someone give a clear definition together with a simple example that explains what is a "callback hell" for someone who does not know JavaScript and node.js ?  When (in what kind of settings) does the "callback hell problem" occu...
I've been looking to understand those 3:   Subject, Behavior subject and Replay subject. I would like to use them and know when and why, what are the benefits of using them and although I've read the documentation, watched tutorials and sea...
When I create an observable from scratch, and have the observer error, then complete, the done part of the subscription never is invoked.  var observer = Rx.Observable.create(function(observer){     observer.onError(new Error('no!'));     obs...
In my app i have something like:  this._personService.getName(id)       .concat(this._documentService.getDocument())       .subscribe((response) => {                   console.log(response)                   this.showForm()        });   //Output:...
Is it possible to have, say, F7 or Q trigger a reactive flow in a Shiny app (in Windows)? This question provides code for alternating tabs with keyboard input, but I am interested in starting reactive flows. For example, a button is 'triggered...
I'm using RxJs to listen to a amqp queu (not really relevant).  I have a function createConnection that returns an Observable that emits the new connection object. Once I have a connection, I want to send messages through it every 1000ms and afte...
I have a code where for each of the ids I am making an ajax request and processing them as results come in. Here is a simple replica of my actual code and jsfiddle:  var ids = [1,2,3,4,5,6]; var ids$ = (id) => {     return Observable.of(id); }; va...
The following code defines behavior i want (it works). Emmition of mousemove event occur only when mouse down.  Rx.Observable.fromEvent(window,"mouseup") .subscribe(    () => {       if(subscription)          subscription.dispose();   } )...
Following up on How to structure rxjs code, concerning how to structure a widget with subwidget when using rx, how would you structure rx code where the subwidgets are data-driven?  As a toy problem, suppose you have an external source (e.g. web serv...
I send request - get an array of data. In order to manipulate that data I need to flatten it, so I can use it as a stream of entities not stream of array of entities but, then on side-effect I want those entities appear in the UI at once, not one by...

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