Hope you have the time with some follow up questions, to understand the solution, and the etiquette for how to behave in this forum:
Is there a better way to achieve my goal? I am fine with this solution, but I would like to know if this was a “hack” to solve my problem?
Etiquette: I saw that you forked my notebook in order to answer my question, which is a great boon of Observable. Will you keep this fork for posteriority, and if so, for how long? Should I keep my notebook so that people can dig back to my original question?
Thanks a lot for your help, and sorry for my questions, but I have been really impressed by Observable and I want to learn this well. It will revolutionize my teaching.
The comma (,) operator evaluates each of its operands (from left to right) and returns the value of the last operand.
I definitely would not call this a hack; it’s quite a standard way to force one short cell to depend upon another. I guess I might more typically write: