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正则表达式详解 | Xsummer #29

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xsummer1997 opened this issue Dec 13, 2020 · 0 comments
Open

正则表达式详解 | Xsummer #29

xsummer1997 opened this issue Dec 13, 2020 · 0 comments

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@xsummer1997
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https://xsummer1997.github.io/2020/12/11/Detailed-Regex/

什么是正则表达式正则表达式,又称规则表达式。(英语:Regular Expression,在代码中常简写为regex、regexp或RE),计算机科学的一个概念。正则表达式通常被用来检索、替换那些符合某个模式(规则)的文本。 基本匹配在搜索时直接输入想要搜索的字母数字或字符,例如: 1234$ cat regtest.txt$ The fat cat sat on the mat$ grep -o

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