Filter inside a dynamo script

[baptiste.vidal]

Hi all
i always stayed away from Dynamo as it looked very deep and dificult to me.
Last week i gave it a chance and now I really like to creat script .

on my HVAC plans, I managed to create a script to number automaticly my Ducts and Ducts fittings.
My script catch the system abbreviation and mix it with numbers.

To make my script better, I would like to start the numer at 0 for each system.

To explain myself: actually on a plan with two systems (supply air / Exhaust air), my script create me a duct number SA-01/SA-02/SA-03… but also a EA-05/EA-06
Actualy, the number follow the last one doesn’t matter on witch system it is.

I would like to have a duct number SA-01 but also a EA-01
Do you understand me?

I tryed to select the elements but this node allows me to do it nly with selection not with the system (with TAB)
a filter node could be an option but I don’t really understand them,

Does anyone could help me please?

Thanks
Baptiste

[ingenieroahmad]

[Schasfoortyoeri]

Alternative you could use this: (or parts of it)
Good luck!

[baptiste.vidal]

here is my script

[Schasfoortyoeri]

This part replaces your code block 1…1000

To keep equal lists

[baptiste.vidal]

Thanks Schasfoortyoeri,
Your code helped me to understand new nodes and now my script is running great.

just last question: I have to copy/paste the code 4 times to be able to number my 4 systems.
on each copy/past i change the “System Abbreviation” filter.

Would it be possible to have just one code for all and be able by himself to separate systems?

[Schasfoortyoeri]

This will work for any amount of different systems

Good luck!