Can I float an adjacent model? Classes are nouns, functions are verbs.
Functions to me are more about scoping things down than about performing logic. The whole program is about performing logic.
If I had to hazard some kind of heuristic with 99% applicability, it'd be to always strive to have code with as few indentations (branches) as possible. If your code is getting too indented, those deep Vs are either a sign that your implementation has a strong mismatch with the underlying problem or you need to break things up into smaller functions.
Like how the phrase “to boldly go where no man has gone before” will bring out pendants.
I don’t even like loops and prefer to functionalize them and run in parallel if sensible.
I know this makes me a bit of a python heathen but my code runs fast as a result.