guys, i have a question about kotlin + fold + func...

# announcements

[Roberto Fernandez]

guys, i have a question about kotlin + fold + function..here it is:

fun getView(cardGraphs: List<Graph>): View {

		val graphsContainer = RelativeLayout(context)
		graphsContainer.layoutParams = RelativeLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT)

		cardGraphs.fold(null) { view: View?, graph: Graph ->
			return addView(graphsContainer, view, getView(graph))
		}

		return graphsContainer
	}

With this code, my function getView (the main function) is returning whatever is the first return of the addView() inside fold..If i set return@fold it needs return Nothing? but my method addView() returns View so it has a type parameter errors..

Can someone explain what is happening here in both cases? and why?

[Czar]

You have return in your fold, it returns from getVeiw as it should, if you want to fold, just have addView in there without return

[Roberto Fernandez]

ok, and what about return @fold? does it mean that i’m returning that value to the next usage of fold, or is that returning that value to the main stack call?

[Czar]

no you do not need return there

[Roberto Fernandez]

ok

[Roberto Fernandez]

thanks!

[Czar]

😉