1. You cant have const arrays.

2. Don’t use singleton if it accepts args.

3. Don’t use “using namespace” in header file.

4. Map has a pair array initializer.

5. Don’t use magic numbers.

6. Const int and string values can be defined in header file but not float values.

7. Virtual inheritance is runtime costly, but use it to avoid the diamond inheritance

8. Const instead of #define

9. Use forward declaration in header files.

10. Use Null Object pattern to avoid checking for null

11. A Class should do only one thing.

12. Use const always if possible

13. Use callbacks to initialize/modify/access STL containers.

14. When template is defined in cpp, to avoid linker errors, add template void foo() to cpp file

15. To choose a STL container, follow this cheat sheet. http://linuxsoftware.co.nz/cppcontainers.html

16. Global functions in namespace. Have namespace {} in .cpp file as well

In GCC, erase doesn’t accept const_iterator

Never ever use using namespace in header files. Because sometimes there are certain functions in  boost and stl that can get conflicted. Like transform()