问题描述
我尝试找到匹配 1 到 999 之间任意数字的正则表达式.什么时候使用钩子我得到一个语法错误
I tried find a regular expression that matches any number between 1 and 999.When is uses hooks I get a syntax error
(bash: syntax error near unexpected token `(')
当我不使用钩子时，什么也没有发生.
and when I don't use the hooks nothing happens.
我的正则表达式是:
egrep ^([1-9][0-9]?|)$ Numbers
更新:
但是我怎样才能让他检查我想让他检查的文件，因为我知道如果我使用 echo 我可以检查数字但我应该检查文件
but how can i get him to check the file i want him to check, because know i can check the numbers if i use echo but i should check the file
推荐答案
这应该匹配 1 到 999 之间的任何数字.我添加了 {0,2} 表示匹配 0 到 2 次重复[0-9] 字符组的.
This should match any number between 1 and 999. I added the {0,2} which means match between 0 and 2 repeats of the [0-9] character group.
^[1-9][0-9]{0,2}$
如果您尝试匹配括号和管道字符，则需要对它们进行转义:
If you are trying to match the parenthesis and pipe character, then you'll need to escape them:
^([1-9][0-9]{0,2}|)$
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