I create copy of one MutableList. When I update element value of copy MutableList But Original List element value also changed. When I use map It working fine but It is like a iteration of whole list, Is any way to do achieve without iteration ? how to copy elements of the MutableList.
val array: MutableList<UserData> = ArrayList()
val userData = UserData("DataOne")
array.add(userData)
val arrayCopy = ImmutableList.copyOf(array)// not working
//val arrayCopy = array.toMutableList()// not working
// val arrayCopy = array.map { it.copy() }.toMutableList()//working
Log.i("----> array ", array[0].name)//print DataOne
Log.i("----> arrayCopy ", arrayCopy[0].name)//print DataOne
arrayCopy[0].name = "DataTwo"
Log.d("----> array ", array[0].name)//print DataTwo
Log.d("----> arrayCopy", arrayCopy[0].name) //print DataTwo
ImmutableList.copyOf
does copy the list. The problem is that you want to copy elements of the list as well. Of course you have to iterate over the list to do that, but so doescopyOf
and I don't see why you expect it's possible to avoid. A slightly better version ofmap
isbecause it iterates only once.