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CSDN博文备份/正则表达式匹配英文字符-142711529.md Normal file
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<p>正则表达式匹配英文 20 个字符，包括大写，小写。</p> <br><p>根据搜索结果，看到 honeymoose 分享过一个正则表达式的要求是:<br /> 匹配 20 个英文字符(大写、小写都包括)。<br /> 那么这个正则表达式可以写成:</p> <br><p></p> <br><pre><code>^[a-zA-Z]{20}$<br></code></pre> <br><p>解释一下:</p> <br><ul><li>^ 表示匹配字符串的开始</li><li>[a-zA-Z] 表示匹配任意大写或小写英文字母</li><li>{20} 表示匹配20个字符</li><li>$ 表示匹配字符串的结束</li></ul> <br><p>这个正则表达式能匹配到一个 20 个英文字符的字符串。</p> <br><p>让我们测试一下:</p> <br><p></p> <br><p>So this regex pattern will match strings like “ABCDEFGHIJKLMNOPQrst” but not “abc123DEF” or “ABCDEFGHIJKLMNOPQ”.</p> <br><p>用正则表达式测试了下字符。</p> <br><p></p> <br><p class="img-center"><a href="https://cdn.isharkfly.com/com-isharkfly-www/discourse-uploads/original/2X/1/1f86cd8f736013613f6570661fe6c603c199c6d6.png" rel="nofollow"><img alt="2024-10-04_21-41-52" height="353" src="https://img-blog.csdnimg.cn/img_convert/1def305e1ef947684af882124f1b1af2.png" width="690" /></a></p> <br><p>以前都比较害怕使用正则表达式，现在有了 GPT，实在是又提高了工作效率。</p> <br><p></p> <br><p><a href="https://www.isharkfly.com/t/topic/16376/3" rel="nofollow" title="正则表达式匹配英文字符 - #3 by honeymoose - 技术宅 - iSharkFly">正则表达式匹配英文字符 - #3 by honeymoose - 技术宅 - iSharkFly</a></p>