Looks very good but it isn't very efficient I think. So, I don't think it should be considered a best practice code.

I was looking for a solution that looks like mine. Found it.

Clever and succinct solution

This is an approach I'd like to see in production, because you're defining the variables in a way that is accessible throughout the program, and it's easy to maintain.

Not intentional. At the time it seemed like a good name for a variable. I didn't realize I was choosing the function name. I will submit an edited solution. Thank you for catching that.

Why are you shadowing the persistence function variable name?