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kotlinlang

Hello everyone!

I'm trying to use a ListAdapter, with a list in which items are not unique. Items are kinda like this: `data class Item(val a: String, val b: String)`

My problems comes trying to create a DiffCallback:

If I use oldItem == newItem on `itemsAreTheSame` , this is going to return true on items that are not the same, for instance, the first two on the following list:

Item("a", "a")
Item("a", "a")
Item("b", "b")

As long as an operation doesn't involve items with the same content, everything works fine: animations, add, edit, move, delete. But this gets buggy when items are equal. *If I delete the second item, the first one will also be deleted. If I add or move something, the animation is wrong, kind of reversed.*

What I wanted to know is if there's any other way to handle something like this, without adding an identifier, nor using a custom differ without ListAdapter.

You need to add one more key in your data class 
Say id:Int that must have unique value for each item.

As long as the data is same so the hashcode will also get generated same so you can't use it

Thanks! I actually solved it like that, but I was wondering if there was another way, so I wouldn't add an id just for this :sweat_smile: