subscribe

For example, if these codes: Button button1 = new Button(); // ... button1.Click -= button1_Clicked; are executed before: button1.Click += button1_Clicked; I found no error or exception, but I am wondering if there is any downside here. If it is safe, why is it allowed to unsubscribe from an event that has never been subscribed? I can't find a reference specific to events, but it is documented for the underlying function that events use, Delegate.Remove : Returns source if value is null or if the invocation list of value is not found within the invocation list of source So it will be safe at

When I run the linter it says: subscribe is deprecated: Use an observer instead of an error callback Code (from an angular 7 app with angular-cli): this.userService.updateUser(data).pipe( tap(() => {bla bla bla}) ).subscribe( this.handleUpdateResponse.bind(this), this.handleError.bind(this) ); Don't know exactly what should I use and how... Thanks! martin subscribe isn't deprecated, only the variant you're using is deprecated. In the future, subscribe will only take one argument: either the next handler (a function) or an observer object. So in your case you should use: .subscribe({ next: this

I'm attempting to inject a string that contains a (click) event into the Angular2 template. The string is dynamically retrieved from the back-end much after the DOM is loaded. No surprise here that Angular won't recognize the injected (click) event. Example template: <div [innerHTML]="test"></div> Example string given from back-end: var test = "When ready, <span (click)=\"itemClick($event)\">click me</span>." Example function call in the Angular component: itemClick(event) { debugger; } My next guess would be to try having Angular subscribe or catch a plain-old javascript event, so the string

What is a complete jQuery solution to subscribing uses to a list on Mailchimp? The problem is that most solutions either use a library or require server side code. I want a quick elegant solution, which gives me complete control over the UI, hence UX of the form and it's functionality. nneko @Nagra's solution is good but it will throw an error when executed from the client's browser due to the Same-Origin Security Policies in effect. In essence, these security measures are there to prevent cross site requests that occur when the originator and the sender are on different domains. If you see

This question already has an answer here: Is it bad to not unregister event handlers? 2 answers I have 3 questions concerning events: Should I always unsubscribe events that were subscribed? What happens if I do NOT? In the below examples, how would you unsubscribe from the subscribed events? I have for example this code: Ctor: Purpose: For database property updates this.PropertyChanged += (o, e) => { switch (e.PropertyName) { case "FirstName": break; case "LastName": break; } }; and this: Purpose: For GUI-binding wrap the model into viewmodels ObservableCollection<Period> periods = _lpRepo

Whats the way to simplify something like the following code example? I can't find the right operator.. could anyone give a short example? this.returnsObservable1(...) .subscribe( success => { this.returnsObservable2(...) .subscribe( success => { this.returnsObservable3(...) .subscribe( success => { ... }, user3743222 As mentioned in comments, you are looking for the flatMap operator. You can find more details in previous answers : How to do the chain sequence in rxjs Why do we need to use flatMap? Your example would read as : this.returnsObservable1(...) .flatMap(success => this