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...
After learning about Observables, I find them quite similar to Node.js streams. Both have a mechanism of notifying the consumer whenever new data arrives, an error occurs or there is no more data (EOF).  I would love to learn about the conceptual/fun...
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...
Consider using the zip operator to zip together two infinite Observables, one of which emits items twice as frequently as the other. The current implementation is loss-less, i.e. if I keep these Observables emitting for an hour and then I switch betw...
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();   } )...

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