# Regex help node-red

**URL:** <https://discourse.nodered.org/t/regex-help-node-red/32651>\
**Category:** General\
**Created:** [9 September 2020 16:19 UTC](https://discourse.nodered.org/t/regex-help-node-red/32651 "2020-09-09T16:19:44Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![niclas.w82](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/niclas.w82/32/31813_2.png) [@niclas.w82](https://discourse.nodered.org/u/niclas.w82)\
**Post date:** [9 September 2020 16:19 UTC](https://discourse.nodered.org/t/regex-help-node-red/32651/1 "2020-09-09T16:19:44Z")

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Hi. Trying to learn regex to use in a change node. I have succeeded to get the expression right but don't make it to work in node-red. Probably some easy misstake but I'm stuck.

 ![Skärmavbild 2020-09-09 kl. 18.14.33](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/8/6/86b32a42684475a1cc5be09d33850a8373bc9499.png)  
 ![Skärmavbild 2020-09-09 kl. 18.18.54](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/a/6/a662b43ca72a20bbb84a59eb07deaa1581afc023.png)

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**Author:** ![UnborN](https://avatars.discourse-cdn.com/v4/letter/u/4491bb/32.png) [@UnborN](https://discourse.nodered.org/u/UnborN)\
**Post date:** [9 September 2020 16:43 UTC](https://discourse.nodered.org/t/regex-help-node-red/32651/2 "2020-09-09T16:43:47Z")

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Hi Nicas ,

I believe you need to enclose you regex expression between `/<regex>/`

So the expression should be :

```auto
$match(payload, /(ID):((\d?)\d)_(\d+)_(\d+)/)

```

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\
**Post date:** [23 September 2020 16:43 UTC](https://discourse.nodered.org/t/regex-help-node-red/32651/3 "2020-09-23T16:43:53Z")

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