Top "Observable" questions

An observable is typically a programming construct that can be "watched" by other parts of the code, called the "observers". Different frameworks and programming languages have different implementations for observables, so this tag should typically be used in conjunction with others.

How to map a response from http.get to a new instance of a typed object in Angular 2

I'm trying to get an understanding in how to map the result from a service call to an object using …

typescript angular rxjs http-get observable
Get previous value of an observable in subscribe of same observable

Is it possible in knockout to get the current value of an observable within a subscription to that observable, before …

knockout.js knockout-2.0 observable
Angular 6 View is not updated after changing a variable within subscribe

Why is the view not being updated when a variable changes within a subscribe? I have this code: example.component.…

typescript angular6 observable rxjs6 angular-changedetection
How can I complete Observable in RxJS

Let's say we have an Observable: var observable = Rx.Observable .fromEvent(document.getElementById('emitter'), 'click'); How can I make it …

javascript stream observable rxjs reactivex
Angular2 Observable - Await multiple function calls before proceeding

I am trying to improve my knowledge of Angular2 by migrating an application currently written in Angular1/AngularJS. One feature …

javascript angular observable angular-promise
Angular2 - Cannot read property 'subscribe' of undefined in nested call

I have looked at a number of resources including this, this and this, but I have not been able to …

angular asynchronous callback observable chaining
Knockoutjs computed passing parameters

I am wondering if it is possible with knockoutjs to pass arguments when binding. I am binding a list of …

javascript binding knockout.js observable
How Does RxJS MergeMap Work?

I don't understand the purpose of mergeMap at all. I have heard two "explanations: "It's like SelectAll" in LINQ - …

javascript angular rxjs observable
Angular 2 cache observable http result data

I have a service that fetches data via the HTTP service and returns an observable object. After the first call …

angular observable angular2-services
How do I return the response from an Observable/http/async call in angular?

I have service which returns an observable which does an http request to my server and gets the data. I …

javascript angular asynchronous typescript observable