What is concatMap in RxJS?
An example of an AI chatbot conversation about concatMap in RxJS for handling observables.
Can you explain what concatMap does in RxJS?
Sure! concatMap is an operator in RxJS that maps each value from an observable to an inner observable, and then concatenates the results.
How does concatMap differ from mergeMap?
The main difference is that concatMap waits for the inner observable to complete before moving on to the next one, while mergeMap subscribes to all inner observables concurrently.
Can you give me an example of using concatMap?
Absolutely! For instance, if you have an observable of user IDs and you want to fetch user details for each ID sequentially, you can use concatMap to ensure each request completes before the next one starts.
What are some use cases for concatMap?
ConcatMap is useful in scenarios where order matters, such as making API calls in sequence or processing events that need to be handled one at a time.
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