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正则表达式匹配精确字符串

代码示例

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正则表达式匹配精确字符串 

you want to achieve a case insensitive match for the word "rocket" 
surrounded by non-alphanumeric characters. A regex that would work would be:

\W*((?i)rocket(?-i))\W*
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正则表达式完全匹配 

use ^ and $ to match the start and end of your string
^matchmeexactly$

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正则表达式匹配精确字符串
匹配正则表达式

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