So I have two lists The first lists contains 96 elements but only 14 of then are unique elements (the other 82 elements are just repetitions of these unique elements) The second list contais 14 unique elements (the same unique elements of the first list) What i want to do is: Create a third list…

One approach to achieve this would be to create a dictionary where List 2 are the keys, List 3 are the values, and List 1 are the accessors. SpringNodes package includes a useful node Springs.Dictionary.ByKeysValues to create and access a dictionary all in one: [image]

@ramoon.bandeira Something like this? [image] RepeatCount.dyn (7.4 KB)

I think i haven’t made my question clear enough so that you could understand. I applied List.AllIndicesof to the list and i got a different list… Sublists of list 1 are of composed of different amounts of elements. [image]

@ramoon.bandeira Not sure if it’ll work, but, did you try what I’ve suggested above? Consider the longer list to be List 1 and the shorter list to be List 2 You don’t need to use List.AllIndicesOf

i tryed it. But i’m too newbie in programming to understand what it means and i haven’t got what i wished to get

Could you post a Dynamo file or screenshot that better explains your issue. With expanded list 1 and list 2. Not the original large file, a simplified one, with fewer values.

How dictionaries functions works? Thank you!

Get index of a list

Vikram_Subbaiah March 28, 2017, 6:33am 13

Hope this gives you some idea…

List-replace Multi Elements

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Get index of a list

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