Angular: Keeping array bindings synchronized and up-to-date

I am working on a project that involves managing a list of items using a service. I need an angular component to display these items and update in real-time whenever changes occur.

The list is quite extensive, so I prefer updating it based on change events. I have been looking for something similar to an ObservableArray class to handle this efficiently.

Unfortunately, I haven't come across any suitable options in Angular or rxjs. While Knockout does offer an ObservableArray, I would rather avoid adding a whole new library just for one class.

Is there a different approach or class similar to ObservableArray that I may have overlooked? Any advice would be greatly appreciated as I'm fairly new to Angular development.

Thank you

angulartypescriptknockout.jsrxjsobservable

Answer №1

If you have a situation where you need to synchronize data from an observable with a particular event, consider utilizing the power of combineLatest. For instance, if you have an event stream called removeItem$ and a function getItems() that retrieves items from a service, you can use combineLatest as shown below:

  removeItemSubject$ = new BehaviorSubject(null)
  removeItemEvent$ = this.removeItemSubject$.asObservable()
  data$ = this.myService.getItems()
  synchronizedData$ = combineLatest([data$, this.removeItemEvent$]).pipe(
    map(([data]) => data)
  )

By implementing the above setup, all you need to do is call removeItemSubject$.next(null) to trigger a refresh of the combineLatest Observable, thereby updating the data retrieved from the service.

In addition, it might be worth exploring the capabilities of the forkJoin operator for similar scenarios.

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