Filter Repeating Items from a List

Revit
1

Hi, I’m trying to split a list into two separate lists, 1 that has all parameters that repeat, and one that is a list of all parameters that don’t repeat. IN the below example, the two lists would be;

0.01
0.02
0.03
0.05

And;
0.04
0.04

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2

Use the UniqueItems node

3

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4

Group and filter. Unique items will pull the duplicates one time each, which is data we get in the single group by key function.

filter single occurances
filter single occurances2984×1628 383 KB

Note that if you want to work with just the values, wire ‘paramVals’ into the list and the keys input on the GroupByKey node.

5

You could also use the CountOccurences node from the Clockwork Package and then have a simple
“Amount > 1 ?” Code Block with a List.FilterbyBoolmask