The better map would represent this as a doubly linked circular list since pretty much any type of programmer considers the language they are most effective in

The better map would represent this as a doubly linked circular list since pretty much any type of programmer considers the language they are most effective in to make them superior to every other sort of programmer. I don't know what it is about programming as a profession, but something which ought to be humbling (have you ever created a bug-free program of any consequence?), produces a surprisingly large number of people who are insufferably arrogant out of all proportion to their accomplishments. Or perhaps the arrogance is defensive, and is built around the fear of being found out as a fallible human being, not some godlike creator.