rxjs

I have an application developed with Ionic 2 that uses Angular 2. I want to update the list of my component in two ways. Automatic - Refresh if there is no update or if the last update was more than 30 minutes ago. Manual - If the user does not want to wait until the next update, he can update manually at any time. When the user leaves the page cancel the automatic refresh and when he comes back re-initialize. I do not want to update immediately when the user enters the page, but only when it completes 30 minutes since the last update. What would be the best way to achieve this? I wonder if

I am trying to integrate ReactiveX into my GUI using RxPY. This is a general ReactiveX question. Say I have a visualization that depends on multiple Observable streams using combine_latest(stream1, stream2, plot_function) . This works great when one Observable changes, like when the user modifies a value; the visualization updates using the new values. However, sometimes both Observables are updated simultaneously, like when the user loads data for both streams from a single file. Technically, one Observable will be updated before the other (whichever comes first in the import function). As a

If I am ever working with rxjs , I normally, in my component file, keep track of all of my subscriptions by pushing said subscriptions into a Subscription array: private subcriptions: Subscription[]; this.subscriptions.push(this.myObservableOne.subscribe(...)); this.subscriptions.push(this.myObservableTwo.subscribe(...)); public ngOnDestroy(): void { this.subscriptions.forEach(s => s.unsubscribe()); } Now, I am running into something that I thought was interesting. If I instead need to subscribe to an Observable from a service: this.myService.myObservable.subscribe(...) Who owns the

Based on this question here , I am using the Rxjs scan operator to keep track of all of the observables that get emitted in an the accumulator array, and then each new incoming value I am adding it to that internal accumulator array created by the scan operator and then I am emitting the single array. This allows me to bind to that array observable with the async pipe in the template and display previews of images user uploaded. However if I want to implement the remove or undo functionality, I have need access to that array to be able to remove an item from it. This is my scan operator:

I am using Angular Service to get data from my API . I implemented retry feature in case of fetching data fails. Now i need to handle the error when all the retries wear out, but im not able to catch it. Following is my code, public getInfoAPI(category:string, id:string = "", page:string = "1", limit:string = "10"){ var callURL : string = ''; if(!!id.trim() && !isNaN(+id)) callURL = this.apiUrl+'/info/'+category+'/'+id; else callURL = this.apiUrl+'/info/'+category; return this.http.get(callURL,{ params: new HttpParams() .set('page', page) .set('limit', limit) }).pipe( retryWhen(errors =>