My personal approach is to not identify with my work. The code is a mean to an end which is solving the problem at hand. If someone has a better approach, they are contributing. If they are bitching in the comments, it means that they have nothing better to do and my time is more important than dealing with them.

It does not always work, especially if I'm tired or distracted, but if I start catching that I'm getting annoyed, I try to take a break.