algorithmic modeling for Rhino
I didn't build a catch for this, since Grasshopper actually handles negative number paths natively, although they don't occur much. Try a path mapper from {A} to {-A} - you'll see these happen no problem. I didn't want to second guess the user, so if you feed a negative number input to the paths input, you will get a negative-index path back out.
Not a problem I just culled it. It's just feels odd the first time you see it...
As you can see I'm having fun great with your tools!
http://www.grasshopper3d.com/xn/detail/2985220:Comment:696946
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