<@U2E974ELT> ```public fun &lt;E, R&gt; ReceiveChannel&lt;E&gt;.flatMap(context: CoroutineContext =...

# coroutines

[deviant]

@elizarov

public fun <E, R> ReceiveChannel<E>.flatMap(context: CoroutineContext = Unconfined, transform: suspend (E) -> ReceiveChannel<R>): ReceiveChannel<R>

is there any chance we will see overloaded flatmap in the lib with such param signature

transform: (E) -> Iterable<R>

?

[Jonathan]

https://kotlin.github.io/kotlinx.coroutines/kotlinx-coroutines-core/kotlinx.coroutines.experimental.channels/flat-map.html

[Jonathan]

oups sorry, I read to fast

[deviant]

yes. i want just to extract collection elements in the channel's element

[Jonathan]

`Sequence<T>.flatMap(transform: (T) -> Iterable<R>): Sequence<R>`doesn't exist either...

[Jonathan]

I'd rather create fun <T> Iterable<T>.toChannel(): ReceiveChannel<T> = produce { forEach { send(it) } }

[elizarov]

We can have both. PRs are welcome

[ilya.gorbunov]

@elizarov That would be an overload on lambda return type, which isn't supported yet in overload resolution.

[elizarov]

Oops. Right. That’s a pity. We’ll have to wait for new type inference for that.