Wow, that's some nontrivial Ruby, some explanation of this code would be nice, I program in Ruby for some 6 years now and I still had to do a lot of head-scratc

Wow, that's some nontrivial Ruby, some explanation of this code would be nice, I program in Ruby for some 6 years now and I still had to do a lot of head-scratching to more or less figure this out. I had no idea Ruby allows overloading of prefix operators, for example.