I have an Angular 2 service:  import {Storage} from './storage'; import {Injectable} from 'angular2/core'; import {Subject}    from 'rxjs/Subject';  @Injectable() export class SessionStorage extends Storage {   private _isLo...
Documentation for the topic is sparse and it's hard to discover an "entry-point" there....
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 would like to to something like:  this._myService.doSomething().subscribe(result => {   doSomething() }); .then( () => dosthelse() ) .then( () => dosanotherthing() )   So I would like to chain .then like in promise. How would I do that i...
I'm brand new to Rx and am finding it difficult to find documentation on composing promises such that data from the first promise is passed into the second and so on. Here's three very basic promises, the calculations on the data aren't...
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...
Hi I am trying to figure out how implement the new angular interceptors and handle 401 unauthorized errors by refreshing the token and retrying the request. This is the guide I have been following: https://ryanchenkie.com/angular-authentication-usi...
I used to develop a lot with promise and now I am moving to RxJS. The doc of RxJS doesn't provide a very clear example on how to move from promise chain to observer sequence.  For example, I usually write promise chain with multiple steps, like...
In Angular 1.x I would sometimes need to make multiple http requests and do something with all the responses. I would throw all the promises in an array and call Promise.all(promises).then(function (results) {...}).  Angular 2 best practices seem t...

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