# Filter elements of sub-lists in a parent list

**URL:** <https://forum.dynamobim.com/t/filter-elements-of-sub-lists-in-a-parent-list/4217>\
**Category:** Uncategorized\
**Created:** [May 27, 2016, 2:39pm UTC](https://forum.dynamobim.com/t/filter-elements-of-sub-lists-in-a-parent-list/4217 "2016-05-27T14:39:05Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Hoc\_Em](https://avatars.discourse-cdn.com/v4/letter/h/82dd89/32.png) [@Hoc\_Em](https://forum.dynamobim.com/u/Hoc_Em)\
**Post date:** [May 27, 2016, 2:39pm UTC](https://forum.dynamobim.com/t/filter-elements-of-sub-lists-in-a-parent-list/4217/1 "2016-05-27T14:39:05Z")

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Hi Everyone,  
I one again have a problem that need your help.  
If I have sub-lists of a parent list (Ex. { {1 3}, {4 6}, {7 0 1}, {8 2 9 0} }), how can I do to get only the first two elements of every sub-lists? (The results after filter should be { {1 3}, {4 6}, {7 0}, {8 2} } )  
Thank you very much for any constructive comment and suggestion.

 ![](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/2X/0/03b1c03535238efcbfc136d0df920945bfa7d8ba.JPG)

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**Author:** ![Einar\_Raknes](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/einar_raknes/32/8566_2.png) [@Einar\_Raknes](https://forum.dynamobim.com/u/Einar_Raknes)\
**Post date:** [May 27, 2016, 4:18pm UTC](https://forum.dynamobim.com/t/filter-elements-of-sub-lists-in-a-parent-list/4217/2 "2016-05-27T16:18:12Z")

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Hello, here you go:  
 ![](https://cdck-file-uploads-us1.s3.dualstack.us-west-2.amazonaws.com/flex022/uploads/dynamobim/original/2X/e/e2cfe39419dee46474b9cee8fd1df276569500c6.png)

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**Author:** ![Vikram\_Subbaiah](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/vikram_subbaiah/32/50797_2.png) [@Vikram\_Subbaiah](https://forum.dynamobim.com/u/Vikram_Subbaiah)\
**Post date:** [May 28, 2016, 2:13am UTC](https://forum.dynamobim.com/t/filter-elements-of-sub-lists-in-a-parent-list/4217/3 "2016-05-28T02:13:59Z")

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![](https://cdck-file-uploads-us1.s3.dualstack.us-west-2.amazonaws.com/flex022/uploads/dynamobim/original/2X/2/27e6896a8c51edcf2b26ac320fd47c2610514a6b.png)

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**Author:** ![Hoc\_Em](https://avatars.discourse-cdn.com/v4/letter/h/82dd89/32.png) [@Hoc\_Em](https://forum.dynamobim.com/u/Hoc_Em)\
**Post date:** [May 28, 2016, 11:53pm UTC](https://forum.dynamobim.com/t/filter-elements-of-sub-lists-in-a-parent-list/4217/4 "2016-05-28T23:53:18Z")

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Got it! Thank you very much, Vikram\_Subbaiah and Einar\_Raknes