Those concepts can, and in many cases should, be as abstract as you like: eg, an "Algorithm" object. I only really "got" design patterns when I realized that t

Those concepts can, and in many cases should, be as abstract as you like: eg, an "Algorithm" object. I only really "got" design patterns when I realized that the strategy pattern was just treating an algorithm/implementation as an object and stopped thinking that OO was exclusively about mapping things to real world objects.