# Bad form probably, but is this true about context variables

**URL:** <https://discourse.nodered.org/t/bad-form-probably-but-is-this-true-about-context-variables/29006>\
**Category:** General\
**Created:** [26 June 2020 01:52 UTC](https://discourse.nodered.org/t/bad-form-probably-but-is-this-true-about-context-variables/29006 "2020-06-26T01:52:13Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![tmichaeltx](https://avatars.discourse-cdn.com/v4/letter/t/73ab20/32.png) [@tmichaeltx](https://discourse.nodered.org/u/tmichaeltx)\
**Post date:** [26 June 2020 13:00 UTC](https://discourse.nodered.org/t/bad-form-probably-but-is-this-true-about-context-variables/29006/4 "2020-06-26T13:00:05Z")

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This was very valuable to me as it showed how truly complex this area is. In particular, I got a lot of insight out of the youtube video you linked to in that other thread. I am quoting your message in that thread to help others come across it:

> [@Bug updating global arrays](https://discourse.nodered.org/t/bug-updating-global-arrays/2403/5):
>
> For those who want to understand better what it means passing by reference and the shalow copy solution from this post here is a good video: [https://www.youtube.com/watch?v=duyshh9Fs1U](https://www.youtube.com/watch?v=duyshh9Fs1U)

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