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Merged
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Aug 18, 2017
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Add some compatible character set #64

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Signed-off-by: lzljbsc <[email protected]>
lzljbsc Aug 18, 2017
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Merge pull request #1 from lzljbsc/dev
lzljbsc Aug 18, 2017
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8 changes: 7 additions & 1 deletion README-cn.md
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`^` 用来检查匹配的字符串是否在所匹配字符串的开头.

例如, 在 `abc` 中使用表达式 `^a` 会得到结果 `a`. 但如果使用 `^b` 将匹配不到任何结果. 应为在字符串 `abc` 中并不是以 `b` 开头.
例如, 在 `abc` 中使用表达式 `^a` 会得到结果 `a`. 但如果使用 `^b` 将匹配不到任何结果. 因为在字符串 `abc` 中并不是以 `b` 开头.

例如, `^(T|t)he` 匹配以 `The` 或 `the` 开头的字符串.

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|\D|匹配非数字: `[^\d]`|
|\s|匹配所有空格字符, 等同于: `[\t\n\f\r\p{Z}]`|
|\S|匹配所有非空格字符: `[^\s]`|
|\f|匹配一个换页符|
|\n|匹配一个换行符|
|\r|匹配一个回车符|
|\t|匹配一个制表符|
|\v|匹配一个垂直制表符|
|\p|匹配 CR/LF (等同于 `\r\n`)，用来匹配 DOS 行终止符|

## 4. 前后关联约束(前后预查)

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