I have a list whose value is filled from API
var dataList: List<Data?>? = null
I need to remove the element from 0th index
while in java I could use
dataList.removeAt(0)
But I don't see the function in kotlin
I have a list whose value is filled from API
var dataList: List<Data?>? = null
I need to remove the element from 0th index
while in java I could use
dataList.removeAt(0)
But I don't see the function in kotlin
List supports only read-only access while MutableList supports adding and removing elements.
so var dataList: MutableList<Data?>? = null
will give you the option to remove an element.
This is because unlike java List
is immutable in Kotlin. That means you can't modify after declaring it. To get functionalities like add,remove you can declare a mutable list in Kotlin like this:
val mutableList = mutableListOf<String>()
mutableList.add("Some data")
mutableList.removeAt(0)
You can't remove an item from a List
. Nor can you add an item, nor change one. That's because List
is a read-only interface!
If the list is mutable, you could instead have a MutableList
reference to it. MutableList
is a subinterface that adds all the methods for adding, changing, and removing items.