# Missing stdlib functions in API ref

**URL:** <https://discuss.kotlinlang.org/t/missing-stdlib-functions-in-api-ref/10562>\
**Category:** Support\
**Created:** [November 28, 2018, 5:32pm UTC](https://discuss.kotlinlang.org/t/missing-stdlib-functions-in-api-ref/10562 "2018-11-28T17:32:12Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![cretz](https://avatars.discourse-cdn.com/v4/letter/c/d2c977/32.png) [@cretz](https://discuss.kotlinlang.org/u/cretz)\
**Post date:** [November 28, 2018, 5:32pm UTC](https://discuss.kotlinlang.org/t/missing-stdlib-functions-in-api-ref/10562/1 "2018-11-28T17:32:12Z")

</div>

I can’t find API docs on the website for extensions such as `LongArray.copyInto`. Is a refresh needed, is there a bug, or am I just looking in the wrong place?

---

<div class="post-metadata">

**Author:** ![ilya.gorbunov](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.kotlinlang.org/ilya.gorbunov/32/1645_2.png) [@ilya.gorbunov](https://discuss.kotlinlang.org/u/ilya.gorbunov)\
**Post date:** [November 28, 2018, 6:03pm UTC](https://discuss.kotlinlang.org/t/missing-stdlib-functions-in-api-ref/10562/2 "2018-11-28T18:03:09Z")

</div>

Here it is: [copyInto - Kotlin Programming Language](http://kotlinlang.org/api/latest/jvm/stdlib/kotlin.collections/copy-into.html)

It’s the first link that appears when you type `copyInto` into the search box.

 ![image](https://us1.discourse-cdn.com/flex019/uploads/kotlinlang/original/2X/4/433514af36451374bb3721def5a4262c83af77f4.png)

---

<div class="post-metadata">

**Author:** ![cretz](https://avatars.discourse-cdn.com/v4/letter/c/d2c977/32.png) [@cretz](https://discuss.kotlinlang.org/u/cretz)\
**Post date:** [November 28, 2018, 6:05pm UTC](https://discuss.kotlinlang.org/t/missing-stdlib-functions-in-api-ref/10562/3 "2018-11-28T18:05:46Z")

</div>

Thanks! Sorry I missed it, I should have looked at the package name of `_Arrays.kt`.