"Open Source" is a good mechanism to develop programs.$
apple is my favorite food.$
Football game is not use feet only.$
this dress doesn't fit me.$
However, this dress is about $ dollars.^M$
GNU is free air not free beer.^M$
Her hair is very beauty.^M$
I can't finish the test.^M$
Oh! The soup taste good.^M$
motorcycle is cheap than car.$
This window is clear.$
the symbol '*' is represented as start.$
Oh!^IMy god!$
The gd software is a library for drafting programs.^M$
You are the best is mean you are the no. .$
The world <Happy> is the same with "glad".$
I like dog.$
google is the best tools for search keyword.$
goooooogle yes!$
go! go! Let's go.$
# I am VBird$
$
一. 搜寻特定字符串
'the'
二. 利用中括号[]搜寻集合字符
't[ae]st'
'oo'
'[^g]oo'
'[^a-z]oo' 或者 '[^[:lower:]]oo'
'[0-9a-zA-Z]oo'
'[0-9]' 或者 '[[:digit:]]'
三. 行首^与行尾字符$
'^the'
'^[a-z]' 或者 '^[[:lower:]]'
'^[^[:alpha:]]'
'\.$'
'^$'
四. 任意一个字符.与重复字符*
'g..d'
'o*'
'oo*'
'ooo*'
'goo*g'
'g.*g'
'[0-9][0-9]*' 或 '[[:digit:]][[:digit:]]*'
五. 限定连续RE字符范围{}
'a\{2\}'
'go\{2,5\}g'
'go\{2,\}g'
六. 锚定词首词尾\b\b或\<\> (来自马哥)
'\bWORD\b' 或 '\<WORD\>'
七. 后向引用
\1: 第一个左括号以及与之对应的右括号所包含的所有内容
以下为扩展型正则表达式, 需配合egrep使用
