Assigning list values to another list with index number

Lists-Logic
#1

I am trying to assign list values to another list basically. But couldnt figure it out how to implement my code into Dynamo.
For example I am retrieving my #1 List from database and want to write these values to #2 List which is already in the Revit data. In short, I want to update these Revit values ( list #2 ) according to data from my Database ( list #1 ).

In the screen shot below I want to be my #1 List[ 0 ][ 0 ] value to be the new value on #2 List[ 0 ][ 0 ],

The problem is these list values could be hundreds so I have to implement a loop system. And I am stucked here.

ekran
ekran.JPG1223Ă—814 123 KB

#2

What is common across the 2 lists ?

You probably can’t assume that they are in the same order ?
i.e. is the third item in list #1 always the same as the third item in list#2

Andrew

#3

Could you give a concrete example of what the list beforehand will look like and what the list afterwards should look like?
Because I don’t understand how and on what basis you want to combine them.

#4

My Revit values are these:
revitdata

#5

Acquired these values through Dyanmo ( Except the first column, its not needed. ) :
revit

#6

And the list of the values that I want to insert to Revit
sqldata

So my aim is to make List #2’s [0] “1B-A-K03” into the value of List #1’s [0] “Mahal-1” and so on.

Another example.
I have 198 data in my Revit and also I have same amount of data in my database. But I want to insert my database values into the Revit. All of these 198 data has exactly same number of columns. But doing it by hand would be very long instead of it for loop could solve my issue I think. But couldnt figure it out

#7

use SetParameterByName if they have same order … take the element from revit ,enter parameter name, then the value from your new list

#8

But I have 198 different row in my data and this would mean 198 different SetParameterByName

#9

no you have’nt, dynamo can read that from one node , just enter the list from 198 element, and the value list from 198 element , just be sure it have the same order,

1 Like
#10

Could you give me an example I am a bit of confused with what you meant with “just enter the list from 198 element” :slight_smile:

#11

They always in the same order. I created my database according to Revit Columns

#12

sth like this:

setpara
setpara.png1302Ă—1010 58.7 KB

1 Like
#13

Are you just trying to replace the value in the list for like a scheduling purpose or do you want to change the parameter on an actual element? Changing just the list is easier to do and would just be a simple replace graph. I can give you an example in a bit.

Here:

replaceatindex
replaceatindex.png1018Ă—874 49.3 KB

Note the list levels on a few of the nodes, some @L2 and one at @L1.

#14

thanks, this is the one that I was looking for!

1 Like
#15

Hello kennyb6,

Where have you get the node “list.replaceItemAtIndex” from?

It looks like an out of the box node but i cant find it…

Many thanks,
Jongon

#16

That is an OOTB node. You may have to check what you’re searching for, the default search function is a bit fussy.

#17

Thanks Hamish!

I finally found it, but indeed the search function it s helpless!