Sorry for skipping a week or two -- I was approving copyedits on the book that is now called [_Programming Ruby 3.3_](https://pragprog.com/titles/ruby5/), because we now want to be proactive about the next release. Coincidentally, the copyedit review does relate to this newsletter. I noticed a particular code sample as I...

A fun thing about learning Ruby is that sometimes concepts that have the same name as in other languages have different behavior and purpose in Ruby. Today: constants They aren't actually constant. They aren't only used for small strings or magic literals. They aren't even mostly used for that in...