<https://youtrack.jetbrains.com/issue/KT-25617>

# announcements

[jw]

https://youtrack.jetbrains.com/issue/KT-25617

[Mike]

Although the list isn’t truly immutable, doesn’t this defeat the purpose of having an immutable list?

If you need to modify it, it needs to be mutable.

[jw]

They don't want to modify it. They want a copy with an updated element.

[Mike]

Doh! Guess I should read the whole thing before replying.

[zokipirlo]

val updated: List<Int> = list.toMutableList().also { it[0] = 99 } I think it's more explicit like that, so it's more obvious what you are doing with list and is also possible to do multiple changes.

[jw]

Those arguments tend to apply to a lot of functions which make copies and mutate and shouldn't preclude the addition of convenience functions