Is there a standard Kotlin function to return a list without the item at a given index?

Question

I need to remove an item from a list without mutating it.

I can write my own:

fun <T> Iterable<T>.withoutItemAt(index: Int): List<T> =
    take(index) + drop(index + 1)

but it feels like this should be in the standard library.

Is there such a function?

Answer 1

You could use filterIndexed:

fun <T> Iterable<T>.withoutItemAt(index: Int): List<T> =
    filterIndexed { i, _ -> i != index }