subject

问题 I have a following class: public class SessionStore { Subject<Session, Session> subject; public SessionStore() { subject = new SerializedSubject<>(BehaviorSubject.create(new Session()); } public void set(Session session) { subject.onNext(session); } public Observable<UserSession> observe() { return subject.distinctUntilChanged(); } } In activity I observe the session and perform network operation on each change: private Subscription init() { return sessionStore .observe() .flatMap(new Func1

问题 I want a pubsub system, with producers and consumers of streams, via a dataplane layer but without Subjects. Many producers can multicast to the same stream name (e.g, 'filters.add'), and multiple consumers can subscribe to the stream. Producers register with a name and stream to create a 'stream of published streams'. If a new producer registers with a particular stream name, the streams flowing to the consumers are dynamically updated such that the data received is a merging of all

问题 i'm trying to create a reusable Modal component. in a ModalService i have a Subject, and a method that that calls next() on the subject. The ModalComponent subscribes to that subject, but whenever the method in the service is being called, the next function of the observer gets triggers twice. Anyone know what causes this? export class ModalService { openModal = new Subject(); constructor() { } open(cmp) { this.openModal.next(cmp); } } Modal Component: export class ModalComponent implements

问题 I have an Observable that produce the unicast value(individually for all observers). But when i am going to convert into multicast using RxJs multicast operators then it return the following error. Property 'connect' does not exist on type 'Observable' Unicast (Working Code) - let source4$ = interval(1000).pipe(take(4)); source4$.subscribe(val => { console.log(`Observer 1: ${val}`); }); setTimeout(function() { source4$.subscribe(val => { console.log(`Observer 2: ${val}`); }); }, 1000);

问题 How to encode mail subject in perl ? Now I finally found something but it's still not working : use MIME::Words qw/encode_mimewords/; $recipientsubject = encode_mimewords('Votre fichier a bien été envoyé'); But the (bugged) result is : Subject: Votre fichier a bien =?ISO-8859-1?Q?=E9t=E9?= =?ISO-8859-1?Q?envoy=E9?= Which displays : Votre fichier a bien étéenvoyé (It eats some spaces) 回答1: Use Encode, it is a core module. perl -Mutf8 -MEncode -E 'say encode("MIME-Header", "Votre fichier a bien

问题 It looks like there are several similar questions but after several days I do not find the proper answer. My question is how to know if the server has closed the websocket and how to try to reconnect. I have seen several examples but none of them worked properly when I wanted to implement the fonctionality of closing the websocket from the client when I change the view. Then I found this example which it's the best one I have seen so far, and with a small modifications I was able to add a

问题 I need to generate German e-mails which contain umlaut characters. In the e-mail itself this works perfectly, but not in the subject of the e-mail. I've tried many different umlaut letters and they all seem to work except for the ü. I also tried different mail libraries (HTMLMimeMail & PHPMailer) and they both fail at this: $mail = new htmlMimeMail(); $mail->setTextEncoding("base64"); $mail->setHTMLEncoding("base64"); $mail->setTextCharset("UTF-8"); $mail->setHTMLCharset("UTF-8"); $mail-

问题 I found the rxJS docs define them as What is a Subject? An RxJS Subject is a special type of Observable that allows values to be multicasted to many Observers. While plain Observables are unicast (each subscribed Observer owns an independent execution of the Observable), Subjects are multicast. and it goes on to give examples but I'm looking for a basic ELI5 explanation. From my understanding is it helps handle and define items in a sequence. Is that correct? I think it would be most helpful

问题 As described in this thread, 'official' solution to unsubscribe from Observables in Angular 5+ in general is using takeUntil. So far, so good. My question is, does this also apply if the Observable I am subscribed to is actually a Subject? 回答1: Once you call .subscribe() on anything (Subjects too), something needs to make sure the subscription gets unsubscribed. Dealing with finite Observables : If you subscribe to a finite observable (meaning an observable that has a finite/limited sequence)

问题 I want send email with subject using variable , this is code public function sendmail(Request $request) { $data = [ 'subject' => $request->input('subject'), 'name' => $request->input('name'), 'phone' => $request->input('phone'), 'email' => $request->input('email') ]; Mail::send('mail.sendmail' , $data, function($msg){ $msg->from('mygmail.com', 'Avil'); $msg->to('mygmail@gmail.com', 'Avil')->subject('Welcome to Laravel 5.1'); }); return redirect()->route('contact.index'); } I wanna subject not