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'm learning RxJS and Angular 2. Let's say I have a promise chain with multiple async function calls which depend on the previous one's result which looks like:   var promiseChain = new Promise((resolve, reject) => {   setTimeout(()...
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...
i was going through this blog and to read about Observables and i couldnt figure out the difference between the Observable and a Subject...
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...

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