I would like to express a suspend function as a callback:

suspend fun getMyObject() : MyObject {
   ...
   return myObject
}

val myApp = myCallback { myObject ->
   /* code using myObject */
}

how should I write the function 

myCallback

?

Hey, so what are you trying to achieve? as I notice you want to execute the

block

but also return a value for

myApp

? For example (Using

String

as the

MyObject

):

suspend fun getMyObject(): String {
        return "something"
    }

    suspend fun myCallback(block: suspend (String) -> String): String {
        return block(getMyObject())
    }

    val myApp = myCallback { myObject ->
        myObject
    }

This makes your

block

responsible to return the value to assign to

myApp

. If you want directly the value from

getMyObject

but ALSO execute the

block

with the value, can be something like this:

suspend fun myCallback(block: suspend (String) -> Unit): String {
        return getMyObject().also { block(it) }
    }

    val myApp = myCallback { myObject ->
        // do something with myObject
    }

that’s great!!! thanks I wasn’t actually focused on

myCallback

returning a value

Start your main with

runBlocking { ...}

or declare your

suspend fun main()

as suspend.

Don't spam multiple channels.

Sorry, I had just posted a message in #coroutines, but somehow this channel is always the most helpful