What is going on right now?

I was reviewing a coworkers code recently. It was this convoluted multidimensional array manipulation that was shuffling, sorting, and filtering all at the same time. It had a totally generic name like "prepareData". I asked for an explanation of what the function was doing and he snapped back that I should ask an LLM instead of wasting his time.

It's been a couple weeks, but I am still irritated.

I am asking you, the person who supposedly wrote this, what it does. When you submit your code for review, that's among the most basic questions you should be prepared to answer.