浙江省高等学校教师教育理论培训

微信搜索“毛凌志岗前心得”小程序

  博客园  :: 首页  :: 新随笔  :: 联系 :: 订阅 订阅  :: 管理

Rubular: a Ruby regular expression editor and tester

Regex quick reference

[abc]A single character of: a, b or c
[^abc]Any single character except: a, b, or c
[a-z]Any single character in the range a-z
[a-zA-Z]Any single character in the range a-z or A-Z
^Start of line
$End of line
\AStart of string
\zEnd of string
.Any single character
\sAny whitespace character
\SAny non-whitespace character
\dAny digit
\DAny non-digit
\wAny word character (letter, number, underscore)
\WAny non-word character
\bAny word boundary character
(...)Capture everything enclosed
(a|b)a or b
a?Zero or one of a
a*Zero or more of a
a+One or more of a
a{3}Exactly 3 of a
a{3,}3 or more of a
a{3,6}Between 3 and 6 of a

options:
i case insensitive
m make dot match newlines
x ignore whitespace in regex
o perform #{...} substitutions only once

For a complete Ruby regex guide, see the Pickaxe.

posted on 2012-08-02 16:19  lexus  阅读(346)  评论(0编辑  收藏  举报