Not new to Kotlin but new to Flow. Is there a way ...

# getting-started

[Zun]

Not new to Kotlin but new to Flow. Is there a way to rewrite the following code to make it shorter, or do I need to resort to writing my own extension? I need to emit null when the list is empty

[Zun]

onEmpty{emit(null)} doesn't work

[knthmn]

Flow.onEmpty() runs the lambda when the flow finishes without emitting any elements, it has nothing to do with the list being empty

[knthmn]

also you are trying to transform showDao.loadHomeScreen(), you can just use Flow.map()

[Zun]

I need to emit a list only when it contains entries. If it is empty, I need to emit null

[knthmn]

i would write the whole thing as

showDao.loadHomeScreen().map { it.takeIf { it.isNotEmpty() } }