is there some neat way to publicly expose a read-o...

# getting-started

[thana]

is there some neat way to publicly expose a read-only view on a private, mutable collection?
i always end up with something like

private val mutable = mutableListOf<Something>()
val readonly: List<Something> = mutable

which is kinda ugly

[Sam]

Here's a ticket to vote for: https://youtrack.jetbrains.com/issue/KT-14663

[KamilH]

In your example one could still cast it to MutableList and modify it from the outside. To avoid this you should use:

mutable.toList()

[thana]

@Sam thanks ✅

[thana]

@KamilH i'm aware of that and its ok in my case 🙂

[KamilH]

I just checked a KEEP proposal and it states that prototype of this feature has been added to Kotlin 1.7.0. Interesting, because I didn’t notice it in changelog

[thana]

yeah me either. but it looks really cool