Is there an overload to `Channel.send()` where I c...

# coroutines

[Lukasz Kalnik]

Is there an overload to Channel.send() where I can send multiple elements (instead of calling send() multiple times)?

[Sam]

Nope. I think the desired behaviour would be different from case to case, so that it would be hard to generalise a single implementation. For example, what would you do if the channel was closed part-way through adding the items?

[Lukasz Kalnik]

True

[Lukasz Kalnik]

My use case is that I send events from a ViewModel to the UI, that the UI should vibrate or play the sound etc.

[Lukasz Kalnik]

Sometimes I want to send multiple events one after another.

[Lukasz Kalnik]

But I will just do it using multiple send() functions

with(_uiEventsChannel) {
    send(Vibrate)
    send(PlaySound)
    send(ShowToast(message))
}

[Joffrey]

You could implement your own naive extension that just loops over a collection of items and sends them one by one. Or create a compound event type that allows you to send a batch of events atomically

[Gijs van Veen]

Or you could just write an extension function to compound them yourself:

suspend fun <E> SendChannel<List<E>>.sendAll(vararg elements: E) = send(elements.toList())

suspend fun <E> ReceiveChannel<List<E>>.collectEach(block: FlowCollector<E>) = receiveAsFlow().collect { elements ->
    elements.forEach { 
        block.emit(it)
    }
}