Not sure how to explain my question which have bothered me for some hours now, but ill try anyway. The problem im having is that my dynamo script sometimes has a list with sub items, and sometimes not. When im using list.map i can only get it to work on either cases, but not both. I bet there is an…

Ive tried many different methods, both with levels, splitting the list and so forth. Can`t get it to work. Is it possible to create an if statement for whether a list has sublist or not?

Use your “string join” with lacing at @@lvl1, it’d go through as if it was a flat list and return it as it was fed. Unless you just flatten the thing, but I guess you need them in sub lists.

I tried. It doesnt work. Maybe im doing something wrong, but i think i tried every possibility.

@Zschlave what exactly do you want your outcome to look like? A combination of the two images? :thinking:

When there are no sublist items i would like the outcome to be like this. [image]

When there are sublist i want to List.Map the items in the sublist.

So if it’s a single item you want the Panel Name and if it’s 2 (or potentially more) items you want the concatenated circuit numbers? Get both parameters from the list of elements. Then use an If statement to return either the panel name or the circuits depending on the length of the sublist. [im…

I have a sneaking suspicion that there is a point earlier in the graph where you zigged but could have zagged to make this easier on yourself. Can you post the full .dyn file?

@Zschlave Alter list structure by introducing a dummy? [StringJoin] StringJoin.dyn (9.4 KB)

I dont know how much you care about the list structure but @Dimitar_Venkov ’s post in this thread shows how to normalize a list so you can have .map work on only one level.

List which have subitems and sometimes not

Topic		Replies	Views	Activity
Different inputs for an "IF" node issue Lists-Logic dynamo	6	922	March 1, 2018
Problem with If function Revit dynamo	10	721	November 4, 2021
"If"-statement providing the wrong output Packages revit	6	1238	May 26, 2016
Sublists and lacing Lists-Logic revit , dynamo	14	705	February 20, 2021
Item List to Booleans by contents of other list Lists-Logic revit , dynamo	4	173	October 23, 2023

Different inputs for an "IF" node issue

Lists-Logic

dynamo

6

922

March 1, 2018

Problem with If function

Revit

dynamo

10

721

November 4, 2021

"If"-statement providing the wrong output

Packages

revit

6

1238

May 26, 2016

Sublists and lacing

Lists-Logic

revit , dynamo

14

705

February 20, 2021

Item List to Booleans by contents of other list

Lists-Logic

revit , dynamo

4

173

October 23, 2023

List which have subitems and sometimes not

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