1. [Google Java 编码风格指南](http://www.hawstein.com/posts/google-java-style.html)
2. [Google C++ 编码风格指南](http://zh-google-styleguide.readthedocs.io/en/latest/google-cpp-styleguide/contents/)
3. [Google Python 编码风格指南](http://zh-google-styleguide.readthedocs.io/en/latest/google-python-styleguide/contents/)