some language code snippets such as java, lua, php, go. In order to sync in different computer. ##java:

1. about basic grammar knowledge;
2. network;
3. kafka;
4. hadoop;
5. ...

##lua:

1. basic grammar knowledge;
2. nginx-lua module;
3. coroutine;
4. ...

##php:

1. basic grammar knowledge;
2. thinkPHP;
3. lnmp;
4. ...