Rating from 0-10 for programing languages

gistfile1.txt

0 - none
1 - basic knowledge about what the language is for and what not
2 - ability to read the language
3 - small modifications of existing code
4 - able to write low-level functionalities

5 - adapting & execution of best practices 
6 - solid execution of given tasks executed with quality proportional to given time

7 - able to refactor components written in the language
8 - able to modify external libraries or components

9 - able to understand and can read the spec of the language
10 - able to modify the language itself