https://blog.liuyi2026.asia/zh/tags/%E6%AD%A3%E5%88%99%E8%A1%A8%E8%BE%BE%E5%BC%8F/Recent content in 正则表达式 on 随记HugozhThu, 19 Dec 2024 17:49:52 +0000https://blog.liuyi2026.asia/zh/docs/technology/RegExp/baseCoreySchafer_/base/Thu, 19 Dec 2024 17:49:52 +0000https://blog.liuyi2026.asia/zh/docs/technology/RegExp/baseCoreySchafer_/base/<h1 id="环境">环境<a class="anchor" href="#%e7%8e%af%e5%a2%83">#</a></h1> <ul> <li>使用视频作者给出的示例，<code>https://github.com/CoreyMSchafer/code_snippets/tree/master/Regular-Expressions</code></li> <li>使用sublimeText打开的文件，ctrl+f时要确认勾选正则及区分大小写<br> <img src="img/ly-20241220122930504.png" alt="" /></li> </ul> <h1 id="simpletxt-基础操作">simple.txt-基础操作<a class="anchor" href="#simpletxt-%e5%9f%ba%e7%a1%80%e6%93%8d%e4%bd%9c">#</a></h1> <h2 id="直接搜索">直接搜索<a class="anchor" href="#%e7%9b%b4%e6%8e%a5%e6%90%9c%e7%b4%a2">#</a></h2> <p><img src="img/ly-20241220123410992.png" alt="" /></p> <h2 id="任意字符">任意字符<a class="anchor" href="#%e4%bb%bb%e6%84%8f%e5%ad%97%e7%ac%a6">#</a></h2> <p><img src="img/ly-20241220123521273.png" alt="" /><br> 这里默认不会显示所有，点击findAll才会出来</p> <h2 id="有些字符需要加反斜杠转义比如--点以及--斜杠本身">有些字符需要加反斜杠转义，比如 . （点）以及 \ （斜杠本身）<a class="anchor" href="#%e6%9c%89%e4%ba%9b%e5%ad%97%e7%ac%a6%e9%9c%80%e8%a6%81%e5%8a%a0%e5%8f%8d%e6%96%9c%e6%9d%a0%e8%bd%ac%e4%b9%89%e6%af%94%e5%a6%82--%e7%82%b9%e4%bb%a5%e5%8f%8a--%e6%96%9c%e6%9d%a0%e6%9c%ac%e8%ba%ab">#</a></h2> <blockquote class='book-hint '> <p>/////，从左到右，和书写方向一致的叫做(正)斜杠。<br> 反之，叫做反斜杠 \</p></blockquote><p><img src="img/ly-20241220124259552.png" alt="" /><br> <img src="img/ly-20241220124341898.png" alt="" /></p> <h2 id="一些元字符">一些元字符<a class="anchor" href="#%e4%b8%80%e4%ba%9b%e5%85%83%e5%ad%97%e7%ac%a6">#</a></h2> <div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-shell" data-lang="shell"><span style="display:flex;"><span>. - Any Character Except New Line 除了换行符的任意字符 </span></span><span style="display:flex;"><span><span style="color:#ae81ff">\d</span> - Digit <span style="color:#f92672">(</span>0-9<span style="color:#f92672">)</span> 数字 </span></span><span style="display:flex;"><span><span style="color:#ae81ff">\D</span> - Not a Digit <span style="color:#f92672">(</span>0-9<span style="color:#f92672">)</span> 非数字 </span></span><span style="display:flex;"><span><span style="color:#ae81ff">\w</span> - Word Character <span style="color:#f92672">(</span>a-z, A-Z, 0-9, _<span style="color:#f92672">)</span> 单词字符，大小写字母+数字+下划线 </span></span><span style="display:flex;"><span><span style="color:#ae81ff">\W</span> - Not a Word Character 非单词字符 </span></span><span style="display:flex;"><span><span style="color:#ae81ff">\s</span> - Whitespace <span style="color:#f92672">(</span>space, tab, newline<span style="color:#f92672">)</span> 空白字符，空格+tab+换行符 </span></span><span style="display:flex;"><span><span style="color:#ae81ff">\S</span> - Not Whitespace <span style="color:#f92672">(</span>space, tab, newline<span style="color:#f92672">)</span> 非空白字符 </span></span><span style="display:flex;"><span> </span></span><span style="display:flex;"><span><span style="color:#ae81ff">\b</span> - Word Boundary 边界字符-单词边界 </span></span><span style="display:flex;"><span><span style="color:#ae81ff">\B</span> - Not a Word Boundary 非单词边界<span style="color:#f92672">(</span>没有单词边界<span style="color:#f92672">)</span> </span></span><span style="display:flex;"><span>^ - Beginning of a String </span></span><span style="display:flex;"><span>$ - End of a String </span></span><span style="display:flex;"><span> </span></span><span style="display:flex;"><span><span style="color:#f92672">[]</span> - Matches Characters in brackets </span></span><span style="display:flex;"><span><span style="color:#f92672">[</span>^ <span style="color:#f92672">]</span> - Matches Characters NOT in brackets </span></span><span style="display:flex;"><span>| - Either Or </span></span><span style="display:flex;"><span><span style="color:#f92672">(</span> <span style="color:#f92672">)</span> - Group </span></span><span style="display:flex;"><span> </span></span><span style="display:flex;"><span>Quantifiers: </span></span><span style="display:flex;"><span>* - <span style="color:#ae81ff">0</span> or More </span></span><span style="display:flex;"><span>+ - <span style="color:#ae81ff">1</span> or More </span></span><span style="display:flex;"><span>? - <span style="color:#ae81ff">0</span> or One </span></span><span style="display:flex;"><span><span style="color:#f92672">{</span>3<span style="color:#f92672">}</span> - Exact Number </span></span><span style="display:flex;"><span><span style="color:#f92672">{</span>3,4<span style="color:#f92672">}</span> - Range of Numbers <span style="color:#f92672">(</span>Minimum, Maximum<span style="color:#f92672">)</span> </span></span><span style="display:flex;"><span> </span></span><span style="display:flex;"><span> </span></span><span style="display:flex;"><span><span style="color:#75715e">#### Sample Regexs ####</span> </span></span><span style="display:flex;"><span> </span></span><span style="display:flex;"><span><span style="color:#f92672">[</span>a-zA-Z0-9_.+-<span style="color:#f92672">]</span>+@<span style="color:#f92672">[</span>a-zA-Z0-9-<span style="color:#f92672">]</span>+<span style="color:#ae81ff">\.</span><span style="color:#f92672">[</span>a-zA-Z0-9-.<span style="color:#f92672">]</span>+</span></span></code></pre></div><h3 id="边界字符">边界字符<a class="anchor" href="#%e8%be%b9%e7%95%8c%e5%ad%97%e7%ac%a6">#</a></h3> <p><img src="img/ly-20241220145605631.png" alt="" /></p>