Your coding style can give you away:

If you’ve been programming for any length of time, no doubt you’ve developed your own coding style. Every developer has preferences not only for things like spacing (e.g,, spaces vs tabs), naming styles (e.g., CamelCase vs. snake_case) and commenting, but also how he or she implements certain types of functionality. New research now shows that a developer’s coding style is a type of fingerprint, which can be used to identify who wrote an anonymous piece of code with a high degree of accuracy.