Combining complementary lists

Revit
1

Hi all, I have 2 complementary lists and I would like to merge the tow into one keeping the same number of items. As you can see, there are empty items in the first list that are in the second list and viceversa.
Is there a simple way to do it??

Thanks in advance

combine lists
combine lists.png2468×1302 189 KB

2

You can do something like this:

image
image.png1094×742 108 KB

3

A more elaborate way …

20170822-10
20170822-10.png1378×516 44.5 KB

6

thanks, thats what i needed!

7

Thanks, it is really easy when you know well! :wink:

8

@gregoriosaura Though the code might seem intimidating at first, the proper solution is the one provided by @jostein_olsen

test (boolean) ? result, if true : result, if false

9

Thanks @Vikram_Subbaiah, do you know where I could find any PDF to study some codes?

10

Start with the dynamo primer. There is a section on design script and code blocks.

http://dynamoprimer.com/en/

Then look into the guide and/or user manual.

http://designscript.io/DesignScript_user_manual_0.1.pdf