Probably an easy one for you guys. I’m trying to join two lists and only keep the values that aren’t null or “”. Using the A+B drops D. Why? Is there a better way? Thanks again! [image]

Amigo @Jack buenas, you want Joint List, or Join Strings?? Check this out!! [image] Join Lists Revit This is also a solution Maybe? [List.SetUnion]

@Jack , you can also use boolean operators. [image] Filter by layers Revit Hello everyone, how to filter sublist that contains another sublist in a proper order? Elements can only be before and after. Thanks in advance. [Filter by layers] [01] f.e. [grafik] KR ANdreas

Thanks! List.SetUnion was the solution. So simple :smiley:

I got excited that it appeared to work, but it put the results out of order. Keep the list structure is vital. [image]

Thanks Hamish. Transpose,Concat,Flatten. Thats going to be used a lot.

Hi @Jack , I think in your first attempt with the Code Block “a+b” does drop the last item since it is (automatically) set to shortest lacing. If you use the + node, not a code block, and set it to longest lacing it should work.

Joining string lists. Drop the nulls

Lists-Logic

gilberto.arechigaiba May 24, 2023, 12:47pm 2

Amigo @Jack buenas, you want Joint List, or Join Strings??
Check this out!!

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Joining string lists. Drop the nulls

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