Kotlin - Most idiomatic way to convert a List to a MutableList

Answer #1 100 %

Consider using the toMutableList() function:


There are toMutableList() extensions for the stdlib types that one might want to convert to a mutable list: Collection, Iterable, Sequence, CharSequence, Array and primitive arrays.

Answer #2 100 %

If you only wants ArrayList, you can create your own Kotlin extension.

fun  List.toArrayList(): ArrayList{
    return ArrayList(this)

Then you can use it in your application like


Simple and easy

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