You don't hold line of codes in your head, you hold a map of interconnected concepts, in various zoom levels. Zoom enough and you'll see lines of codes, but mo

You don't hold line of codes in your head, you hold a map of interconnected concepts, in various zoom levels. Zoom enough and you'll see lines of codes, but most of the time you just manipulate these larger blocks. As you build up your language for your specific problem and your tools of expressions evolve, each concept maps significantly more behavior, logic & power. A good example for this can be seen in professional chess players playing blind-folded, they don't memorize the location of all 32 pieces on the board, they memorize the different formation groups, their mental vocabulary has increased to include groups of chess pieces in specific arrangements. If you ask them to remember randomly placed chess pieces they fail just like the average person.