If works as expected if I use `flatMap` instead of `withLatestFrom` , but curious why `withLatestFro...

# rx

[iex]

If works as expected if I use flatMap instead of withLatestFrom , but curious why withLatestFrom doesn't. I thought it will get the current value at the point of time I activate the subject.

[Zach Klippenstein (he/him) [MOD]]

The reason flatMap works is because flatMap will resubscribe every time the upstream observable emits. And since dealerAction is a Single, it will only compute the value on subscription.

So with flatMap, every time you click, you’re re-subscribing to dealerAction, which re-reads the preference, and you get your new value. With withLatestFrom, dealerAction is only subscribed to once, and since it’s a Single it will only emit once.

[iex]

wow, that's a pretty great explanation 🙂

[iex]

understood

[iex]

thanks again!