How do you create a copy of a List, that changes r...

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[kd]

How do you create a copy of a List, that changes references but keeps the objects?
I have tried toList method but it does not seem to work.
Context: I am trying to implement a simple recycler view and update it using DiffUtil, but the oldList and newList are the same for some reason

[karelpeeters]

.toList() makes a shallow copy, the elements aren't copied but the lists themselves are independant.

[kd]

So how do I make a deep copy?

[nkiesel]

generally, by providing a copy method for your class. This is not built-in because it's often situation-specific and generic solutions will not be able to handle recursive/self-referencing data structures. Having said that: list.map{it.copy()} works if the list contains data class objects (which have a shallow copy method) and you can live with that.