Martin Sikora – Medium

One common type of problems reappearing over and over again on stackoverflow.com is “reusing” a single instance of any of the Subject classes and then being surprised that it doesn’t work as one might expect.
Let’s start by talking about Subjects and their internal state and why is it so important to be aware of complete and error notifications. Then we’ll move to more interesting examples with ReplaySubject and BehaviorSubject classes....

From the “Response Interceptor” example it looks like the map() operator takes an error handler (err: any) => { ... } . However the Observable.map() doesn’t (http://reactivex.io/rxjs/class/es6/Observable.js~Observable.html#instance-method-map) and...

In 2015 I worked on a web app in AngularJS that seemed to be very simple but over time it evolved into a quite large project and I was hit by Angular’s performance soon and really hard.
I realised how little information is available apart from the most basic recommendations and since I’ve spent some time optimising our AngularJS app to run well even with 100 000 rendered expressions at once I thought it would be worth sharing it with...

Node.js is a brilliant product. It gives you so much freedom and I think it’s ideal for single purpose web servers.
Another great thing is WebSocket. Nowadays it’s widely supported and its usage is mostly in very specific applications such as games or Google Docs. So I wanted to try to make some very simple real world application....