Ask HN: What can you learn about a person by reading their code?

A lot. A classical research question, as well as a practice I suppose, is to try to deduce the author of a particular program, whether in source or in binary. Cf.:

https://news.ycombinator.com/item?id=39135165

If they ever had to inherit someone elses code.

Code with detailed comments and include some whys, really care, and have had the nightmare of others leaving.

Although I knew one person who was notorious for just throwing their predecessors code out and re writing it. It is tough to interview to exclude that type.

Most important thing - if he likes to engineer (like most of developers regardless of experience) or solving the problem (rare kind at any seniority level).

In a team I was a part of some years ago I had the distinct feeling of being able to tell which one of my teammates wrote what code.

Something in the favorite methods to solve problems, variable names and so on (it was in Python where you have 100 ways to solve 1 thing!)

I think something very distinct and easy to pick is how they think, at least in the board term of OOP vs functional.

I’ve seen Go code being forced to do OOP and functional JS… it’s fascinating!