# A silly Concatenate list problem

**URL:** <https://forum.dynamobim.com/t/a-silly-concatenate-list-problem/38089>\
**Category:** Revit\
**Created:** [July 9, 2019, 9:02am UTC](https://forum.dynamobim.com/t/a-silly-concatenate-list-problem/38089 "2019-07-09T09:02:03Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Peter\_Jenkins](https://avatars.discourse-cdn.com/v4/letter/p/a8b319/32.png) [@Peter\_Jenkins](https://forum.dynamobim.com/u/Peter_Jenkins)\
**Post date:** [July 9, 2019, 9:02am UTC](https://forum.dynamobim.com/t/a-silly-concatenate-list-problem/38089/1 "2019-07-09T09:02:03Z")

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Overall my aim is to create a dynamo player script that combines two parameters which is then placed into another parameter (shame Revit can’t do concatenate in parameters). These parameters are either alpha or numerical so a simple “+” node doesn’t always work.  
Where i’m having an issue is getting the two parameters to join from lists.

In the image I have list A & B, I can’t get the items at each index to join one another and make a new list which will be what I use to populate the new parameter. I managed to make I work using schedules which is what you see in the concatenate list. I tried joining them using a code block from a previous post but that wasn’t using numbers but with this code block decimals come into play.  
Any thought or packages out there that can solve my problem?

 ![image](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/5/5/55525738a277920a188da4914fe28d8e628febbb.png)

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**Author:** ![Marcel\_Rijsmus](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/marcel_rijsmus/32/8539_2.png) [@Marcel\_Rijsmus](https://forum.dynamobim.com/u/Marcel_Rijsmus)\
**Post date:** [July 9, 2019, 10:28am UTC](https://forum.dynamobim.com/t/a-silly-concatenate-list-problem/38089/2 "2019-07-09T10:28:52Z")

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use the string from object node to translate a numeric value into a string, then concatenate

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**Author:** ![3Pinter](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/3pinter/32/74327_2.png) [@3Pinter](https://forum.dynamobim.com/u/3Pinter)\
**Post date:** [July 9, 2019, 10:29am UTC](https://forum.dynamobim.com/t/a-silly-concatenate-list-problem/38089/3 "2019-07-09T10:29:00Z")

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convert list items to strings first

Nvm. @Marcel_Rijsmus ninja’d me 🕶

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<div class="post-metadata">

**Author:** ![Peter\_Jenkins](https://avatars.discourse-cdn.com/v4/letter/p/a8b319/32.png) [@Peter\_Jenkins](https://forum.dynamobim.com/u/Peter_Jenkins)\
**Post date:** [July 9, 2019, 11:14am UTC](https://forum.dynamobim.com/t/a-silly-concatenate-list-problem/38089/4 "2019-07-09T11:14:49Z")

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Thank you. Always something stupid.