Random subset of countries' names are added to the list. (To show more or fewer countries initially, simple adjust numItems inside MainActivity) On "Add random" button click, a random UUID string is added to a random position in the list
Branch: https://github.com/ericntd/recyclerview-diffutil-demo/tree/insert-delete-simple
When we need display the position of each item in the list
Branch: https://github.com/ericntd/recyclerview-diffutil-demo/tree/insert-delete-maintaining-position