Note
Introduction
1. Linux stuff
2. ARM/KVM
- 2.1. 2015/4/24 bootloader note
3. Programming
- 3.1. Regular expression
4. Settings Vim
- 4.1. Vim Plugins: taglist, ctags, cscope
- 4.2. Dotfile settings(.zshrc, .vimrc, .tmux.conf)
5. others
- 5.1. Reading collections

Note

Regular Expression Note

Non Capturing Group (?:)

Ignoring the groups start with ?: Example

(http|ftp)://([^/\r\n]+)(/[^\r\n]*)?
Match "http://stackoverflow.com/"
     Group 1: "http"
     Group 2: "stackoverflow.com"
     Group 3: "/"

Match "http://stackoverflow.com/questions/tagged/regex"
     Group 1: "http"
     Group 2: "stackoverflow.com"
     Group 3: "/questions/tagged/regex"

(?:http|ftp)://([^/\r\n]+)(/[^\r\n]*)?
Match "http://stackoverflow.com/"
     Group 1: "stackoverflow.com"
     Group 2: "/"

Match "http://stackoverflow.com/questions/tagged/regex"
     Group 1: "stackoverflow.com"
     Group 2: "/questions/tagged/regex"