Can UITableViewDiffableDataSource detect an item changed?

Question

(The question was rewritten after discussing with @AndreasOetjen below. Thanks for his comments.)

I ran into an issue with using UITableView with diffable d

Answer 1

After almost one day's clueless experiments, I believe I figured out how diffable data source worked and solved my issue based on that understanding (it turned out my original thought was almost correct).

Diffable data source uses item hash to identify item. For the same item that exists in both old and new snapshots, diffable data source checks if the item changes by doing an "==" operation with its old and new values.

Once figured out, it looks like quite obvious and simple approach. But it's so fundamental that I can't understand why it isn't mentioned explicitly anywhere.

So, to answer my original question, yes, diffable data source can detect item value change. That said, it becomes tricky when item value is of reference type and/or the text shown in row is, say, properties of objects referenced by that object (e.g., relationship in Core Data), etc.

Another note. Whether using entire item struct or just part of it to generate item hash doesn't matter, as long as it identifies the item. I prefer to using only the essential part of the item which really identifies it.