Convention over Configuration...

First time I saw that principle applied in programming is when I started doing stuff, using Ruby on Rails. It is so great! All applications use the same principles, so let's mark their default values in advance, and if a programmer needs to tune something - let him do it. Not otherwise!.. Sounds sort of disappointing from certain perspective - "no my application is not unique", and "there is a 100 lines of original code in my 15000 lines app". Worse yet, there is a 100 lines of orignal code in our million-liner!... What's that - Palanhiuk's thoughts expressed in programming language? )