How do you write good code? How do you know when you’ve written good code? Dave Cheney writes this with inspiration from PEP 20 - The Zen of Python.

If there’s a continuum between good and bad, how to do we know what the good parts are? What are its properties, its attributes, its hallmarks, its patterns, and its idioms?

Which brings me to idiomatic Go. To say that something is idiomatic is to say that it follows the style of the time. If something is not idiomatic, it is not following the prevailing style. It is unfashionable.

More importantly, to say to someone that their code is not idiomatic does not explain why it’s not idiomatic. Why is this?