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1838.html
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<!DOCTYPE html><html lang="zh-CN" data-theme="light"><head><meta charset="UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="width=device-width,initial-scale=1"><title>正则表达式 | 征蓬</title><meta name="keywords" content="正则"><meta name="author" content="huy"><meta name="copyright" content="huy"><meta name="format-detection" content="telephone=no"><meta name="theme-color" content="#ffffff"><meta name="description" content="常用正则表达式">
<meta property="og:type" content="article">
<meta property="og:title" content="正则表达式">
<meta property="og:url" content="http://example.com/1838.html">
<meta property="og:site_name" content="征蓬">
<meta property="og:description" content="常用正则表达式">
<meta property="og:locale" content="zh_CN">
<meta property="og:image" content="http://example.com/pics/scenery/21.jpg">
<meta property="article:published_time" content="2021-08-27T08:11:12.000Z">
<meta property="article:modified_time" content="2021-11-17T00:28:04.297Z">
<meta property="article:author" content="huy">
<meta property="article:tag" content="正则">
<meta name="twitter:card" content="summary">
<meta name="twitter:image" content="http://example.com/pics/scenery/21.jpg"><link rel="shortcut icon" href="/pics/avatar/8.png"><link rel="canonical" href="http://example.com/1838"><link rel="preconnect" href="//cdn.jsdelivr.net"/><link rel="stylesheet" href="/css/index.css"><link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/@fortawesome/fontawesome-free/css/all.min.css" media="print" onload="this.media='all'"><link rel="stylesheet" href="https://lf3-cdn-tos.bytecdntp.com/cdn/expire-1-M/node-snackbar/0.1.16/snackbar.min.css" media="print" onload="this.media='all'"><link rel="stylesheet" href="/font/wcsf.ttf" media="print" onload="this.media='all'"><script>const GLOBAL_CONFIG = {
root: '/',
algolia: undefined,
localSearch: {"path":"search.xml","languages":{"hits_empty":"找不到您查询的内容：${query}"}},
translate: undefined,
noticeOutdate: undefined,
highlight: {"plugin":"highlighjs","highlightCopy":true,"highlightLang":true,"highlightHeightLimit":false},
copy: {
success: '复制成功',
error: '复制错误',
noSupport: '浏览器不支持'
},
relativeDate: {
homepage: false,
post: false
},
runtime: '',
date_suffix: {
just: '刚刚',
min: '分钟前',
hour: '小时前',
day: '天前',
month: '个月前'
},
copyright: undefined,
lightbox: 'fancybox',
Snackbar: {"chs_to_cht":"你已切换为繁体","cht_to_chs":"你已切换为简体","day_to_night":"你已切换为深色模式","night_to_day":"你已切换为浅色模式","bgLight":"#49b1f5","bgDark":"#121212","position":"bottom-left"},
source: {
jQuery: 'https://lf26-cdn-tos.bytecdntp.com/cdn/expire-1-M/jquery/3.6.0/jquery.min.js',
justifiedGallery: {
js: 'https://cdn.jsdelivr.net/npm/justifiedGallery/dist/js/jquery.justifiedGallery.min.js',
css: 'https://cdn.jsdelivr.net/npm/justifiedGallery/dist/css/justifiedGallery.min.css'
},
fancybox: {
js: 'https://cdn.jsdelivr.net/npm/@fancyapps/fancybox@latest/dist/jquery.fancybox.min.js',
css: 'https://cdn.jsdelivr.net/npm/@fancyapps/fancybox@latest/dist/jquery.fancybox.min.css'
}
},
isPhotoFigcaption: false,
islazyload: false,
isanchor: false
}</script><script id="config-diff">var GLOBAL_CONFIG_SITE = {
title: '正则表达式',
isPost: true,
isHome: false,
isHighlightShrink: false,
isToc: true,
postUpdate: '2021-11-17 08:28:04'
}</script><noscript><style type="text/css">
#nav {
opacity: 1
}
.justified-gallery img {
opacity: 1
}
#recent-posts time,
#post-meta time {
display: inline !important
}
</style></noscript><script>(win=>{
win.saveToLocal = {
set: function setWithExpiry(key, value, ttl) {
if (ttl === 0) return
const now = new Date()
const expiryDay = ttl * 86400000
const item = {
value: value,
expiry: now.getTime() + expiryDay,
}
localStorage.setItem(key, JSON.stringify(item))
},
get: function getWithExpiry(key) {
const itemStr = localStorage.getItem(key)
if (!itemStr) {
return undefined
}
const item = JSON.parse(itemStr)
const now = new Date()
if (now.getTime() > item.expiry) {
localStorage.removeItem(key)
return undefined
}
return item.value
}
}
win.getScript = url => new Promise((resolve, reject) => {
const script = document.createElement('script')
script.src = url
script.async = true
script.onerror = reject
script.onload = script.onreadystatechange = function() {
const loadState = this.readyState
if (loadState && loadState !== 'loaded' && loadState !== 'complete') return
script.onload = script.onreadystatechange = null
resolve()
}
document.head.appendChild(script)
})
win.activateDarkMode = function () {
document.documentElement.setAttribute('data-theme', 'dark')
if (document.querySelector('meta[name="theme-color"]') !== null) {
document.querySelector('meta[name="theme-color"]').setAttribute('content', '#0d0d0d')
}
}
win.activateLightMode = function () {
document.documentElement.setAttribute('data-theme', 'light')
if (document.querySelector('meta[name="theme-color"]') !== null) {
document.querySelector('meta[name="theme-color"]').setAttribute('content', '#ffffff')
}
}
const t = saveToLocal.get('theme')
if (t === 'dark') activateDarkMode()
else if (t === 'light') activateLightMode()
const asideStatus = saveToLocal.get('aside-status')
if (asideStatus !== undefined) {
if (asideStatus === 'hide') {
document.documentElement.classList.add('hide-aside')
} else {
document.documentElement.classList.remove('hide-aside')
}
}
const detectApple = () => {
if (GLOBAL_CONFIG_SITE.isHome && /iPad|iPhone|iPod|Macintosh/.test(navigator.userAgent)){
document.documentElement.classList.add('apple')
}
}
detectApple()
})(window)</script><link rel="stylesheet" href="/css/custom.css" media="defer" onload="this.media='all'"><!-- hexo injector head_end start --><link rel="stylesheet" href="https://npm.elemecdn.com/hexo-butterfly-tag-plugins-plus@latest/lib/assets/font-awesome-animation.min.css" media="defer" onload="this.media='all'"><link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/hexo-butterfly-tag-plugins-plus@latest/lib/tag_plugins.min.css" media="defer" onload="this.media='all'"><script async src="https://npm.elemecdn.com/hexo-butterfly-tag-plugins-plus@latest/lib/assets/carousel-touch.js"></script><!-- hexo injector head_end end --><meta name="generator" content="Hexo 5.4.1"></head><body><div id="sidebar"><div id="menu-mask"></div><div id="sidebar-menus"><div class="avatar-img is-center"><img src="/pics/Asoul/8.jpg" onerror="onerror=null;src='/img/friend_404.gif'" alt="avatar"/></div><div class="site-data"><div class="data-item is-center"><div class="data-item-link"><a href="/archives/"><div class="headline">文章</div><div class="length-num">54</div></a></div></div><div class="data-item is-center"><div class="data-item-link"><a href="/tags/"><div class="headline">标签</div><div class="length-num">17</div></a></div></div><div class="data-item is-center"><div class="data-item-link"><a href="/categories/"><div class="headline">分类</div><div class="length-num">12</div></a></div></div></div><hr/><div class="menus_items"><div class="menus_item"><a class="site-page" href="/"><i class="fa-fw fas fa-home"></i><span> 首页</span></a></div><div class="menus_item"><a class="site-page" href="/archives/"><i class="fa-fw fas fa-archive"></i><span> 时间轴</span></a></div><div class="menus_item"><a class="site-page" href="/tags/"><i class="fa-fw fas fa-tags"></i><span> 标签</span></a></div><div class="menus_item"><a class="site-page" href="/categories/"><i class="fa-fw fas fa-folder-open"></i><span> 分类</span></a></div><div class="menus_item"><a class="site-page" href="/about/"><i class="fa-fw fas fa-heart"></i><span> 关于</span></a></div></div></div></div><div class="post" id="body-wrap"><header class="post-bg" id="page-header" style="background-image: url('/pics/scenery/21.jpg')"><nav id="nav"><span id="blog_name"><a id="site-name" href="/">征蓬</a></span><div id="menus"><div id="search-button"><a class="site-page social-icon search"><i class="fas fa-search fa-fw"></i><span> 搜索</span></a></div><div class="menus_items"><div class="menus_item"><a class="site-page" href="/"><i class="fa-fw fas fa-home"></i><span> 首页</span></a></div><div class="menus_item"><a class="site-page" href="/archives/"><i class="fa-fw fas fa-archive"></i><span> 时间轴</span></a></div><div class="menus_item"><a class="site-page" href="/tags/"><i class="fa-fw fas fa-tags"></i><span> 标签</span></a></div><div class="menus_item"><a class="site-page" href="/categories/"><i class="fa-fw fas fa-folder-open"></i><span> 分类</span></a></div><div class="menus_item"><a class="site-page" href="/about/"><i class="fa-fw fas fa-heart"></i><span> 关于</span></a></div></div><div id="toggle-menu"><a class="site-page"><i class="fas fa-bars fa-fw"></i></a></div></div></nav><div id="post-info"><h1 class="post-title">正则表达式</h1><div id="post-meta"><div class="meta-firstline"><span class="post-meta-date"><i class="far fa-calendar-alt fa-fw post-meta-icon"></i><span class="post-meta-label">发表于</span><time class="post-meta-date-created" datetime="2021-08-27T08:11:12.000Z" title="发表于 2021-08-27 16:11:12">2021-08-27</time><span class="post-meta-separator">|</span><i class="fas fa-history fa-fw post-meta-icon"></i><span class="post-meta-label">更新于</span><time class="post-meta-date-updated" datetime="2021-11-17T00:28:04.297Z" title="更新于 2021-11-17 08:28:04">2021-11-17</time></span><span class="post-meta-categories"><span class="post-meta-separator">|</span><i class="fas fa-inbox fa-fw post-meta-icon"></i><a class="post-meta-categories" href="/categories/%E5%85%B6%E4%BB%96/">其他</a></span></div><div class="meta-secondline"></div></div></div></header><main class="layout" id="content-inner"><div id="post"><article class="post-content" id="article-container"><h2 id="基本概念">基本概念</h2>
<ul>
<li><code>^</code>：匹配开头内容，例如：<code>^#</code> 匹配 <code>#</code> 开头的字符串</li>
<li><code>$</code>：匹配结尾内容，例如：<code>#$</code> 匹配 <code>$</code> 结尾的字符串</li>
</ul>
<h2 id="正则常用网站">正则常用网站</h2>
<p><a target="_blank" rel="noopener" href="https://github.com/any86/any-rule">https://github.com/any86/any-rule</a></p>
</article><div class="post-copyright"><div class="post-copyright__author"><span class="post-copyright-meta">文章作者: </span><span class="post-copyright-info"><a href="mailto:undefined">huy</a></span></div><div class="post-copyright__type"><span class="post-copyright-meta">文章链接: </span><span class="post-copyright-info"><a href="http://example.com/1838.html">http://example.com/1838.html</a></span></div><div class="post-copyright__notice"><span class="post-copyright-meta">版权声明: </span><span class="post-copyright-info">本博客所有文章除特别声明外，均采用 <a href="https://creativecommons.org/licenses/by-nc-sa/4.0/" target="_blank">CC BY-NC-SA 4.0</a> 许可协议。转载请注明来自 <a href="http://example.com" target="_blank">征蓬</a>！</span></div></div><div class="tag_share"><div class="post-meta__tag-list"><a class="post-meta__tags" href="/tags/%E6%AD%A3%E5%88%99/">正则</a></div><div class="post_share"><div class="social-share" data-image="/pics/scenery/21.jpg" data-sites="facebook,twitter,wechat,weibo,qq"></div><link rel="stylesheet" href="https://jsdelivr.pai233.top/npm/social-share.js/dist/css/share.min.css" media="print" onload="this.media='all'"><script src="https://jsdelivr.pai233.top/npm/social-share.js/dist/js/social-share.min.js" defer></script></div></div></div><div class="aside-content" id="aside-content"><div class="sticky_layout"><div class="card-widget" id="card-toc"><div class="item-headline"><i class="fas fa-stream"></i><span>目录</span></div><div class="toc-content"><ol class="toc"><li class="toc-item toc-level-2"><a class="toc-link" href="#%E5%9F%BA%E6%9C%AC%E6%A6%82%E5%BF%B5"><span class="toc-number">1.</span> <span class="toc-text">基本概念</span></a></li><li class="toc-item toc-level-2"><a class="toc-link" href="#%E6%AD%A3%E5%88%99%E5%B8%B8%E7%94%A8%E7%BD%91%E7%AB%99"><span class="toc-number">2.</span> <span class="toc-text">正则常用网站</span></a></li></ol></div></div></div></div></main><footer id="footer" style="background-image: url('/pics/scenery/21.jpg')"><div id="footer-wrap"><div class="copyright">©2021 - 2022 By huy</div><div class="framework-info"><span>框架 </span><a target="_blank" rel="noopener" href="https://hexo.io">Hexo</a><span class="footer-separator">|</span><span>主题 </span><a target="_blank" rel="noopener" href="https://github.com/jerryc127/hexo-theme-butterfly">Butterfly</a></div></div></footer></div><div id="rightside"><div id="rightside-config-hide"><button id="readmode" type="button" title="阅读模式"><i class="fas fa-book-open"></i></button><button id="darkmode" type="button" title="浅色和深色模式转换"><i class="fas fa-adjust"></i></button><button id="hide-aside-btn" type="button" title="单栏和双栏切换"><i class="fas fa-arrows-alt-h"></i></button></div><div id="rightside-config-show"><button id="rightside_config" type="button" title="设置"><i class="fas fa-cog fa-spin"></i></button><button class="close" id="mobile-toc-button" type="button" title="目录"><i class="fas fa-list-ul"></i></button><button id="go-up" type="button" title="回到顶部"><i class="fas fa-arrow-up"></i></button></div></div><div id="local-search"><div class="search-dialog"><div class="search-dialog__title" id="local-search-title">本地搜索</div><div id="local-input-panel"><div id="local-search-input"><div class="local-search-box"><input class="local-search-box--input" placeholder="搜索文章" type="text"/></div></div></div><hr/><div id="local-search-results"></div><span class="search-close-button"><i class="fas fa-times"></i></span></div><div id="search-mask"></div></div><div><script src="/js/utils.js"></script><script src="/js/main.js"></script><script src="https://lf26-cdn-tos.bytecdntp.com/cdn/expire-1-M/node-snackbar/0.1.16/snackbar.min.js"></script><script src="/js/search/local-search.js"></script><div class="js-pjax"></div><script defer="defer" id="ribbon" src="https://jsdelivr.pai233.top/npm/butterfly-extsrc@1/dist/canvas-ribbon.min.js" size="150" alpha="0.6" zIndex="-1" mobile="false" data-click="false"></script><script id="click-heart" src="https://jsdelivr.pai233.top/npm/butterfly-extsrc@1/dist/click-heart.min.js" async="async" mobile="false"></script></div><!-- hexo injector body_end start --><script async src="//at.alicdn.com/t/font_2032782_8d5kxvn09md.js"></script><!-- hexo injector body_end end --></body></html>