IF node broken?

Revit
1

See the picture below;

I’ve used the IF node and fed it 2 lists and a boolean.
The Boolean returns true, so the first list should be returned.
Before the list goes into the IF-node it has 10 items, after it comes out it only has 9 items. Where did the last item go?

Pasted image455×663 25 KB

2

It’s caused by the lacing. The if node has shortes lacing as default, and it can’t be changed. Try the scopif or a simple python script.

if-shortest-lacing.gif996×638 121 KB 

if IN[0]:
	OUT = IN[1]
else:
	OUT = IN[2]
1 Like
3

The behavior was changed in this PR:

Additional notes:

  • With a formula node you can change lacing.
  • Design Script if behaves the same way as the if node.

Pasted image595×536 24.4 KB

4

Thanks for your reply Einar,

I’ve tried this solution and i’m even more surprised now… this time it misses 2 items in my List.

Pasted image521×715 34.1 KB

5

Hello, could you please tell what is tested with String.Contains?

6

@M.Melching right click the Formula node and choose longes lacing.

1 Like
7

In principle, it works:

IF-test.JPG970×693 39.4 KB

8

This was the right answer. Well, it was the lacing. It chose the shortest list as lacing. Thanks for solving this