Separate list, modify value, reconstitute to new list

Grasshopper
1

Hi Forum,
I’m requesting some insight on how to tackle the the following: I have a generated list which I would like to:

  • separated based on the values: Val A and Val B
  • retain the list position of Val A and B as null in new lists
  • have the ability to modify Val B
  • reconstitute source list with updated Val B
    Attached is a sketch of where my head is at together with the source list

thanks in advance

list_query.gh (18.1 KB)

list_query
list_query997×596 48.5 KB

2

Sift Pattern + Combine Data do exactly what you are looking for :+1:

image
image1331×652 76.6 KB

list_query_Re.gh (10.6 KB)

1 Like
3

Hi Inno,
Would you be so kind as to knock up a quick definition as to how - I’m sure it’s as simple as you describe, I’m just not seeing the wood for the trees at this portion of the day.

1 Like
4

hi, @ryan.paetzold
You can use the components Sift Pattern with Combine Data.

Sift_Pattern
Sift_Pattern1877×807 114 KB

list_query_edit.gh (12.8 KB)

You can find more useful information about data filtering with Sift Pattern in the tutorial below.

1 Like
5

Thanks @Lina
Thanks for both solution and link to tutorial - much appreciated

@Inno - sorted thanks

1 Like