It seems like I don't fully understand SAM interfa...

# getting-started

[frank]

It seems like I don't fully understand SAM interfaces in Kotlin yet. On one hand, interfaces in Java classes work just fine:

chartViewHolder.container?.setOnClickListener {
    onArtistClickListener?.onArtistClick(artists[chartViewHolder.adapterPosition])
}

However when I try to set onArtistClickListener (a var) in the adapter it just fails. This is the Kotlin interface:

interface OnArtistClickListener {
    fun onArtistClick(artistModel: ArtistModel)
}

And this is how I'd expect to be able to set it:

chartAdapter.onArtistClickListener = { Timber.d("Start new controller for $it") }

But it says it found () -> Unit and requires ChartAdapter.OnArtistClickListener?.
So this (http://stackoverflow.com/questions/26507099/lambda-expressions-in-kotlin) post seems to explain why this is, but I'm not quite sure what it would actually look like then with () -> Unit. Any advice?