When are the switchMap and concatMap operators used in programming with RxJS?

• switchMap: Used when we are only interested in the result of the last request (Observable), and want to cancel previous ones if they haven't completed yet. For example, it is used in real-time search, where an autocomplete request should be canceled if the user enters a new character before receiving a response to the previous one.
• concatMap: Used when we need to execute requests (Observables) sequentially, one after another, and wait for each to complete before starting the next. The execution order is guaranteed. It is used, for example, for performing a series of dependent operations or for loading data that must be processed in strict order.

// Example of using switchMap
source$.pipe(
  switchMap(searchTerm => apiService.search(searchTerm)) // Cancels previous search requests
).subscribe(results => console.log(results));

// Example of using concatMap
source$.pipe(
  concatMap(itemId => apiService.getItem(itemId)) // Processes items one by one, waiting for each request to complete
).subscribe(item => console.log(item));