Sự khác biệt giữa mergeMap và switchMap trong RxJs

rewrite a rxjs class (BehaviorSubject)

rewrite a rxjs class (Observable)

rewrite a rxjs class using FP (Subject classes: Behavior, Replay, Async) 1st approach

rewrite a rxjs class (Subject classes: Behavior, Replay, Async)

Best practices for a clean and performant Angular application