observable

问题 I've got an angular HttpInterceptor and I need to call an encryption method that's defined like so: private async encrypt(obj: any): Promise<string> { I'm not sure how to handle this in the HttpInterceptor though: intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> { const modified = req.clone({ body: this.encrypt(req.body) }); return next.handle(modified).pipe( I'm not sure how to tie the two of those together so that I can call the encrypt method properly from

问题 I've got an angular HttpInterceptor and I need to call an encryption method that's defined like so: private async encrypt(obj: any): Promise<string> { I'm not sure how to handle this in the HttpInterceptor though: intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> { const modified = req.clone({ body: this.encrypt(req.body) }); return next.handle(modified).pipe( I'm not sure how to tie the two of those together so that I can call the encrypt method properly from

问题 I've got an angular HttpInterceptor and I need to call an encryption method that's defined like so: private async encrypt(obj: any): Promise<string> { I'm not sure how to handle this in the HttpInterceptor though: intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> { const modified = req.clone({ body: this.encrypt(req.body) }); return next.handle(modified).pipe( I'm not sure how to tie the two of those together so that I can call the encrypt method properly from

问题 I'd like to have a worker task update a SwiftUI view. The worker task is busy doing the procedural work of the application - playing sounds, and firing timer-based events. I'd like to to flash several icons in a SwiftUI view during those timer events. So I want to trigger a view refresh in those icon views. So, I created an environmentObject called Settings. It's instantiated in the App Delegate, and attached to the root view in the SceneDelegate. The Settings object works just fine inside

问题 I would like to get each key value pair in the results object from my api to display on my front-end. ie(category, type, difficulty, questions correct_answer) I have the service and components set up correctly and all i need to do is fetch the json and display each pair. The method name is called fetchQuestions as seen below. I was able to successfully get data by just simply calling it the same way I did fetchPeople but the json format is not the same so it's not displaying. I then tried

问题 I have the following method which isn't working correct: getProducts(): Observable<Product[]> { let PRODUCTS: Product[]; this.http.get(this.base_url + "api/products") .subscribe( (data) => { for(var i in data) { PRODUCTS.push(new Product(data[i].id, data[i].name, data[i].category, data[i].description, data[i].price, data[i].amount)); } }, (error) => { console.log(error); }); return of(PRODUCTS); } The error I'm getting is this: TypeError: Cannot read property 'push' of undefined Now, I know

问题 I have a polling use-case where: I want to call an API that, based on business logic, returns numbers(1-10) or error (network issue/ exception in API etc..) instantly (1.5-2 sec). If the API returns an error (network issue/ exception in API etc..) then I want to unsubscribe the polling and display error. If the API returns success, I want to check the return value and un-subscribe(if the return value is 5) or keep the polling going. I want to call API every 5 sec. I want to keep the max time

问题 I am unsure if this is the right thinking, but I just started using ngrx for a project and now everything is an observable. It works well when I use the async pipe in the component view, but I am struggeling when I need the value from the store in code. My current approach is to make a property and subscribe in the ngOnInit to the selector, so I can use the current value of the state in my functions. For example storing configration options (webservice address) and then using that inside a

问题 I have a little problem in async pipe Here is my case , I need to run nested observables in async pipe in html because i use on push strategy and i dont want to use some workarounds or change detector reference . My problem is , when i run the code below only the first observable is called Should i add return statements? Or whats the problem ? Ts code this.http.getUsers(criteria) .pipe(map(data=>{ data.users.map(user=>{ this.http.getUserData(user.id) .pipe(map(res=>{user.data=res.data}))}}

问题 Suppose I have this : public class UploadDicomSet { public UploadDicomSet() { var cachCleanTimer = Observable.Interval(TimeSpan.FromMinutes(2)); cachCleanTimer.Subscribe(CheckUploadSetList); //Start subscriber } void CheckUploadSetList(long interval) { //Stop and dispose subscriber } public void AddDicomFile(SharedLib.DicomFile dicomFile) { //Renew subscriber, call CheckUploadSetList 2 minutes later } } 1- in CheckUploadSetList I want to dispose or finish observable 2- in AddDicomFile I want