Default implementation of a DiffUtil.Callback

DiffUtilCallback.kt

import android.support.v7.util.DiffUtil

open class DiffUtilCallback<T>(val oldList: List<T>, val newList: List<T>) : DiffUtil.Callback() {

    override fun areItemsTheSame(oldItemPosition: Int, newItemPosition: Int)
        = oldList[oldItemPosition] == newList[newItemPosition]

    override fun getOldListSize()
        = oldList.size

    override fun getNewListSize()
        = newList.size

    override fun areContentsTheSame(oldItemPosition: Int, newItemPosition: Int)
        = oldList[oldItemPosition] == newList[newItemPosition]
}