private val mItems = ArrayList<Int>()
(1..item_count).mapTo(mItems) { it }

/*
 mItems will be: "1, 2, 3, 4, 5, ..., item_count"
*/

class ModelClass(var id: Int = 0, var status: String = "smth")

//?
private val mItems = ArrayList<ModelClass>()
(1..item_count).mapTo(mItems) { mItems[position].id = it } // Something like this
//?

(1..item_count).mapTo(mItems) { ModelClass(it) }