If node error

1

If node returns not all items of the list depends on other option’s number of items.
why does it happen???

see the image below

if_error
if_error.jpg778×1008 165 KB

2

This is because of how the If node deals with lists in general.

One possible solution to try (though I haven’t tried it myself): use dictionaries instead of lists. Theoretically they are both single items, even if they have varying number of items.

If that fails, make a dictionary from both lists and pass either the true key or the false key, and use that to get the correct set of data from the dictionary.

1 Like
3

making a list as an item works…
but the error should be corrected.

Thanks

4

Use the node: “ScopeIf”
thx

Capture
Capture.PNG954×583 46.1 KB

5

oh, it’s better.
Thanks. :slight_smile:

6

all above solutions don’t work for me at last…
so I found another workaround.

if_workaround
if_workaround.jpg1140×702 126 KB

Thanks guys.

7

I got so anoyed by the IF node that I either use a python script to do it or a design script node:
python

# Enable Python support and load DesignScript library
import clr
clr.AddReference('ProtoGeometry')
from Autodesk.DesignScript.Geometry import *

ToF = IN[0]
List1 = IN[1]
List2 = IN[2]

Result = []

if ToF == True:
	Result.append(List1)
else:
	Result.append(List2)

flat_List1 = [item for sublist in Result for item in sublist]

OUT = flat_List1

Design Script
result = [TrueVal, FalseVal];
result[ToF ? 0 : 1];

1 Like
8

it’s also useful.
Thanks.