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?

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

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?

no you do not need return there

ok

😉