If I want to create a Flow that need the value of another Flow as input parameter, is

flatMapLatest

the function I should be using?

flatMapLatest

generates a new flow for each emission of the original flow, is that what you want?

@Francesc No, I don't think so. Should I just use

map

then?

Do you want the first flow first value only, or do you want to observe all emissions of the first flow?

All emissions yeah

And you want one further emission from each or multiple?

I want both flows to keep emitting

How are their outputs related?

Each flow I'm querying a table, but the first flow value has the row id that I need to do the second query

That sounds like flatMapLatest, for each row ID emission you emit a set of items belonging to that row

@Francesc Thanks for confirming. all these functions get quite confusing 🙂

flatMapLatest

- aborts inner flow when new value from outer flow arrives

flatMapConcat

- waits for inner flow to finish (emits all value from it) before processing new values from outer flow

flatMapMerge

- for each new value from outer flow, emits all value from inner flows concurrently