#suggest Add uniform coding

[allphfa]

1. Similar to the python file header encoding, the first line of code

- * - coding:utf-8 - * -

When coding is not uniform, the editor often overwrites the entire code
Result in code rewrite

I think we should unify the encoding. The default encoding of VS is not necessarily utf-8, sometimes gbk, but UTF-8 by default of gcc. When we switch compiler tools, we often encoding in disorder.

2. Another problem is to add the original string like python, r"STR".

3. Add iterator callback function

Sort(@{ (key) => key}, array)