Culling from list based on value

Grasshopper
,
1

Hello everyone, I am new to Grasshopper and would appreciate a few ideas about accomplishing the task described below.

I’d like to cull from each branch any items which do not have a value of 0 or Pi. I imagine this is pretty simple, but it does have me scratching my head…

image
image823×795 32.1 KB

Cheers,
Noah

2

One way:

image
image1203×831 57.4 KB

3

Thank you for the demonstration Adam. Of course it all comes down to the logic gates! Something I never paid enough attention to in university… It’s never too late though