The unsubscribe option is only shown for senders with a high reputation: This only works for some senders right now. We’re actively encouraging senders to support auto-unsubscribe — we think 100% should. We won’t provide the unsubscribe option on messages from spammers: we can’t trust that they’ll actually unsubscribe you, and they might even send … Read more
Option 1: clean & explicit. Works like a charm Option 2: more procedural, less stream-like. Works like a charm. Note that your stream will not get a ‘complete’ event which can cause unexpected behaviour Option 3: takeWhile – will have the subscription stay around untill an emission is created and then the takeWhile is evaluated. … Read more
A Service in Angular is a singleton. This means that the service will exist for the entire lifespan of your application. The reason that you need to unsubscribe from an observable, is to avoid memory leaks. When do you get memory leaks? If something has been garbage collected while it was still subscribed to an … Read more
No You don’t need to unsubscribe as the observable itself completes.You can verify the same by adding a finalize block to see whether observable completes itself or not. import { finalize } from “rxjs/operators”; dialogRef .afterClosed() .pipe(finalize(() => console.log(“completed”))) .subscribe(data => { console.log(data); }); And when you will close the dialog, you will see completed … Read more
Yes, go for it. Although some people think IDisposable is implemented only for unmanaged resources, this is not the case – unmanaged resources just happens to be the biggest win, and most obvious reason to implement it. I think its acquired this idea because people couldn’t think of any other reason to use it. Its … Read more
Well, let’s take the last question first. You can’t reliably unsubscribe from an event that you’ve subscribed to directly with a lambda expression. You either need to keep a variable around with the delegate in (so you can still use a lambda expression) or you need to use a method group conversion instead. Now as … Read more