unsubscribe

问题 My users can subscribe to threads that send them an email with a simple unsubscribe link. This link contains an encrypted subscribeid and a verifying userid via this process: // generate iv and create encrypted data $iv = openssl_random_pseudo_bytes(16); $encrypted = openssl_encrypt($data, 'AES-128-CBC', ENCRYPTION_KEY,0,$iv); // send the iv along with the encrypted text $ciphertext = $iv . $encrypted; // generate a hash which can verify the data has not changed $hash = hash_hmac('sha1',

问题 I'm making a drag and drop application and I have created an observable to the mouse position, that repositions my drag-object . mouseMove$: any; constructor(){ this.mouseMove$ = Observable.fromEvent(document, 'mousemove') .do((mouseevent: MouseEvent) => { if (document.getElementById("drag-object")){ document.getElementById("drag-object").style.left = (mouseevent.clientX) + 'px'; document.getElementById("drag-object").style.top = (mouseevent.clientY) + 'px'; } }); With this implementation I

问题 Closed . This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be answered with facts and citations by editing this post. Closed 3 months ago . There are several ways to unsubscribe from observables on Angular components (by using ngOnDestroy). Which option below should be preferred and why (e.g. technical reasons, performance, etc.)? Option 1: takeUntil Using RxJS takeUntil to unsubscribe @Component({ selector:

问题 The best method in iOS to subscribe a event is ViewDidLoad, but when dismiss the view , the ViewDidUnload() is not called(only when the memory warning.) Which place is the best to unsubscribe the event? (In the subviewController I subscribe a event that reference the MainViewController, When open the subview twice, I receive two event trigger because the unsubscribe in viewdidunload() is never called.) How about with subscribe/unsubscribe in ViewWillAppear/ViewWillDisapper? public override

问题 What i have done is: A B C D E F ---------------------- 2 4 6 2 5 7 3 3 6 0 6 8 3 6 5 1 6 8 5 0 1 1 1 5 1 2 2 0 1 5 WHY I AM Subscribing B to A , C-> B , because on change of A , B will change and on change of B -> C will change (its like excel) where there are formulas on each field and change of each field other field will change ObservableB[i] = ObervableA[i]; ObservableC[i] = ObservableB[i].pipe(); ObservableD[i] = obbservableC[i].pipe( Map(res => res +1) ); ObservableE[i] = ObservableD[i

问题 I have an angular application where I am reading a file and processing it and this processing is part of observable. I have a service which returns the observable an (ngbusy:subscription). I am subscribing to this observable in my component. The observable is assigned to an ngBusy which displays a spinner. Now the spinner keeps spinning even after subscribe is complete. I know we need to unsubscribe to the obervable. But when I unsubscri in the same method where we are subscribing, I don't

问题 I have the following function (taken from the facebook webhook tutorial) for subscribing an app to a page, but I want the reverse thing to happen ( unsubscribe). How can I do that? I have not found any answers yet, in JavaScript. function subscribeApp(page_id, page_access_token) { console.log('Subscribing page to app! ' + page_id); FB.api( '/' + page_id + '/subscribed_apps', 'post', {access_token: page_access_token}, function(response) { console.log('Successfully subscribed page', response);

问题 From my understanding of Angular and RxJs there are two ways to terminate Observables. You can unsubscribe() from them or use takeUntil() and complete() . Below are examples of each approach (in pseudocode). The unsubscribe() approach private _id: number; private _subscriptions: Subscription[] = []; constructor(private _route: ActivatedRoute) { this._getId(); } public ngOnDestroy(): void { this._subscriptions.forEach( subscription => subscription.unsubscribe() ); } private _getId(): void {

问题 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? 回答1: 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

问题 I have a Class A...in it's constructor...I am assigning an anonymous function to Object_B's eventHandler. How do I remove (unsubscribe) that from Dispose method of class A ? Any help would be appreciated ! Thanks Public Class A { public A() { B_Object.DataLoaded += (sender, e) => { Line 1 Line 2 Line 3 Line 4 }; } Public override void Dispose() { // How do I unsubscribe the above subscribed anonymous function ? } } 回答1: You can't, basically. Either move it into a method, or use a member