I don't know if there's
I don't know if there's really coding standards. Maybe, Programmer's standard. If his work becomes popular then it becomes a standard. If there's really a standard, even a company doesn't follow it. They make their own.
Problems that I see here why programmers find it difficult to review codes...
* Most programmers learned by themselves - A different approach/method can be developed in a code.
* There are different programming languages - If a programmer has an expertise and shifts to another language due to requirements, a similar approach/method may be applied to a code.
* Closed source - It is hard to review a source code which is closed or a programmer hides something :)
* Coding style - another problem that I see here, when you review the code it can be/have the following:
- a copy/paste code
- IDE dependent
- spaghetti code
- coding conventions