Kotlin multiple filters in lambda, with different results

Question

I am new to Kotlin and have stumbled upon this simple problem. I have an event stream where I consume Login events like this:

        mystream.events
            .filter { event -> event is UserLogin }.collectLatest { event -> handleLogin(event) }

Now in the same stream, I could also receive a Logout event, which I also want to handle in the same manner - but by calling a different handling function.

I can duplicate the same lines of code to do the same for the Logout event as well, but instead is there a way to do it in the same lambda/block of code. Sort of like an if/else?

Tenfour04 · Accepted Answer · 2022-04-24 13:28:47Z

1

I would use a when statement for this:

mystream.events.collectLatest { event ->
    when (event) {
        is UserLogin -> handleLogin(event)
        is UserLogout -> handleLogout(event)
        //...
    }
}

answered Apr 24, 2022 at 13:28

Tenfour04

95.1k14 gold badges125 silver badges181 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Kotlin multiple filters in lambda, with different results

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related