# Wiki Code Tutorials

**URL:** <https://forums.unrealengine.com/t/wiki-code-tutorials/256>\
**Category:** C++\
**Tags:** unreal-engine\
**Created:** [March 20, 2014, 9:39pm UTC](https://forums.unrealengine.com/t/wiki-code-tutorials/256 "2014-03-20T21:39:34Z")\
**Posts on this page:** 1\
**Showing post:** 283

<div class="post-metadata">

**Author:** ![Rama](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/rama/32/882413_2.png) [@Rama](https://forums.unrealengine.com/u/Rama)\
**Post date:** [October 9, 2015, 9:42pm UTC](https://forums.unrealengine.com/t/wiki-code-tutorials/256/283 "2015-10-09T21:42:28Z")

</div>

How to Modify BP Variable References in C++ And Send Back to BP

Dear Community,

Here’s a wiki on how you can pass BP variable data to C++, modify it in C++, and then send it back to BP without copying the data!

is really imporant for modifying BP variable arrays, and I also found a handy usecase for making a BP ++ operator node!

**How to Modify Blueprint Variable References In C++ Without Copying**

> **[A new, community-hosted Unreal Engine Wiki](https://forums.unrealengine.com/t/a-new-community-hosted-unreal-engine-wiki/141494)**
>
> After over a year in maintenance mode, the official Unreal Engine Wiki is now permanently offline. These resources now live on a new community-run Unreal Engine Community Wiki — https://unrealcommunity.wiki/! You will be able to find content from...

Enjoy!

---

_[View the full topic](https://forums.unrealengine.com/t/wiki-code-tutorials/256)._