I have a list of elements filtered by a parameter. I want to take all the elements that have matching parameters and assign a value to a different parameter. That part is easy enough. The issue I have is that the list will vary every time I run the script. So I want to create a loop to run until the…

I have this DesignScript Loop While reference in my bookmarks that could help to get started: http://dynamobim.org/forums/topic/how-to-run-a-loop-on-a-dynamo-graph/ And also this example of LoopWhile using a custom node as a function: [image] Loop with Python You should…

Please send elements showing what you’ve tried and searched and illustrating what you aim so we can quickly understand what it’s all about. Thanks :slight_smile:

Ok. The first screen shot is the custom node I created in order to get me the list in the second screen shot. Then I run that list through the rest of the script seen in screen shot 2. I want to take the rest of the list, filter again, then run though the last part of the script. [Custom Node] [Loop…

That last post got me what I needed. Thanks.

@coastguard09 List.GroupByKey might be worth exploring. If I’ve properly understood, you most likely can avoid Loop While or/and a Custom node Try replacing your custom node with these… [20171117-3]

It’s amazing how much simpler these scripts could be. Thanks very much. Now I need to get the last part to run on each list individually. Thanks. I’ll post when I get it, unless someone beats me to the punch. I just increased my step amount to 1 and everything works beautifully. Thanks fellas.

[image] coastguard09: Now I need to get the last part to run on each list individually Hint: Start by changing lacing to Longest

[/quote] Hint: Start by changing lacing to Longest I am going to attempt to explain this. When I switched the lacing to longest it assigns a unique number to each element in all the lists (or list of list? I’m new to all of this). When I leave it to shortest, it takes each list and assigns the s…

See if the below example helps … Note that lacing on List.Count The last node only serves to demonstrate that parameter values were applied. (Not required, otherwise) [20171117-4a]

That will be useful in the future but what I have works for what I need. [Fitting List] I want my list to be numbered as seen in the above screen shot.

Iterating through list

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Bach February 22, 2018, 7:30am 12

@coastguard09 Please see solution in my topic List.count for list level 2

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Iterating through list

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