{"id":165700,"date":"2019-12-21T09:00:18","date_gmt":"2019-12-21T01:00:18","guid":{"rendered":"https:\/\/lrxjmw.cn\/?p=165700"},"modified":"2019-12-25T10:38:10","modified_gmt":"2019-12-25T02:38:10","slug":"getting-started-regular-expressions","status":"publish","type":"post","link":"https:\/\/lrxjmw.cn\/getting-started-regular-expressions.html","title":{"rendered":"\u524d\u7aef\u7684\u6b63\u5219\u8868\u8fbe\u5f0f\u5165\u95e8\u5341\u6b65\u8d70"},"content":{"rendered":"<table>\n<tbody>\n<tr>\n<td style=\"padding: 5px 12px; width: 25px; font-size: 22px; text-align: center; background: #E8E8E8; line-height: 30px; color: #999;\">\u5bfc\u8bfb<\/td>\n<td style=\"padding: 10px 10px 12px; line-height: 20px;\"><strong>\u672c\u6587\u4ecb\u7ecd\u4e86\u6b63\u5219\u8868\u8fbe\u5f0f\u4e2d\u7684\u57fa\u672c\u7528\u6cd5\uff0c\u5728\u65e5\u5e38\u5f00\u53d1\u4e2d\u57fa\u672c\u5c31\u591f\u7528\u4e86\u3002\u6b63\u5219\u5f88\u5f3a\u5927\uff0c\u4f46\u662f\u4e5f\u4e0d\u80fd\u6ee5\u7528\u3002\u5982\u679c\u4f60\u5199\u51fa\u4e86\u4e00\u4e2a\u5f88\u590d\u6742\u7684\u53ea\u6709\u4f60\u80fd\u770b\u61c2\u7684\u6b63\u5219\uff0c\u66f4\u597d\u7684\u505a\u6cd5\u662f\u4e0d\u4f7f\u7528\u6b63\u5219\u53bb\u5b9e\u73b0\u5b83\u3002<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<div   id="j6sjwn9j3u"    style=\"font-size: 14pt; color: white; background-color: black; border-left: red 10px solid; padding-left: 14px; margin-bottom: 20px; margin-top: 20px;\"><strong><strong>1. \u6982\u89c8<\/strong><\/strong><\/div>\n<p>\u5728 JavaScript \u4e2d\uff0c\u4f7f\u7528 \/\/ \u5373\u53ef\u521b\u5efa\u4e00\u4e2a\u6b63\u5219\u8868\u8fbe\u5f0f\u5bf9\u8c61\uff0c\u5f53\u7136\u4e5f\u53ef\u4ee5\u4f7f\u7528 new RegExp()<\/p>\n<p>\u5e38\u7528\u7684\u8ddf\u6b63\u5219\u76f8\u5173\u7684\u65b9\u6cd5\u6709 match\u3001test \u548c replace\u3002<\/p>\n<p>\u5176\u4e2d match\uff0creplace \u90fd\u662f\u5b57\u7b26\u4e32\u4e0a\u7684\u65b9\u6cd5\uff0c test \u662f\u6b63\u5219\u5bf9\u8c61\u4e0a\u7684\u65b9\u6cd5\u3002<\/p>\n<p>\u4e0b\u9762\u770b\u5177\u4f53\u7684\u56fe\u793a\uff1a<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-165701\" src=\"https:\/\/lrxjmw.cn\/wp-content\/uploads\/2019\/12\/30.png\" alt=\"\" width=\"600\" height=\"525\" srcset=\"https:\/\/lrxjmw.cn\/wp-content\/uploads\/2019\/12\/30.png 600w, https:\/\/lrxjmw.cn\/wp-content\/uploads\/2019\/12\/30-300x263.png 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/p>\n<div   id="j6sjwn9j3u"    style=\"font-size: 14pt; color: white; background-color: black; border-left: red 10px solid; padding-left: 14px; margin-bottom: 20px; margin-top: 20px;\"><strong><strong>2. \u5339\u914d\u5355\u5b57\u7b26<\/strong><\/strong><\/div>\n<ol>\n<li>\/reg\/ \u53ef\u4ee5\u76f4\u63a5\u5339\u914d\u5177\u4f53\u7684\u5b57\u7b26\u4e32 reg\u3002<\/li>\n<li>\/[arzy]\/ \u4e2d\u7684\u4e2d\u62ec\u53f7[] \u5219\u4ee3\u8868\u5339\u914d arzy \u4e2d\u7684\u4efb\u610f\u5355\u4e2a\u5b57\u7b26<\/li>\n<li>\/[f-h]\/ \u4e2d\u7684\u4e2d\u6760 - \u4ee3\u8868\u5339\u914d\u5b57\u6bcd\u8868\u987a\u5e8f\u4e2d f \u5230 h \u4e2d\u7684\u4efb\u610f\u5355\u4e2a\u5b57\u7b26<\/li>\n<li>\/[1-3]\/ \u5219\u4ee3\u8868\u5339\u914d\u6570\u5b57 1 \u5230 3<\/li>\n<\/ol>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-165702\" src=\"https:\/\/lrxjmw.cn\/wp-content\/uploads\/2019\/12\/31.png\" alt=\"\" width=\"600\" height=\"528\" srcset=\"https:\/\/lrxjmw.cn\/wp-content\/uploads\/2019\/12\/31.png 600w, https:\/\/lrxjmw.cn\/wp-content\/uploads\/2019\/12\/31-300x264.png 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/p>\n<div   id="j6sjwn9j3u"    style=\"font-size: 14pt; color: white; background-color: black; border-left: red 10px solid; padding-left: 14px; margin-bottom: 20px; margin-top: 20px;\"><strong><strong>3. \u6b63\u5219\u9009\u9879<\/strong><\/strong><\/div>\n<p>\u6b63\u5219\u5bf9\u8c61\u7684\u540e\u9762\u4e5f\u53ef\u4ee5\u8ddf\u9009\u9879\uff0cJavaScript \u4e2d\u5e38\u7528\u7684\u9009\u9879\u6709\uff1a<\/p>\n<ol>\n<li>i - \u4ee3\u8868\u5ffd\u7565\u5927\u5c0f\u5199<\/li>\n<li>m - \u4ee3\u8868\u591a\u884c\u5339\u914d<\/li>\n<li>g - \u4ee3\u8868\u5168\u5c40\u5339\u914d(\u53ef\u4ee5\u5339\u914d\u591a\u6b21)<\/li>\n<\/ol>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-165703\" src=\"https:\/\/lrxjmw.cn\/wp-content\/uploads\/2019\/12\/32.png\" alt=\"\" width=\"600\" height=\"471\" srcset=\"https:\/\/lrxjmw.cn\/wp-content\/uploads\/2019\/12\/32.png 600w, https:\/\/lrxjmw.cn\/wp-content\/uploads\/2019\/12\/32-300x236.png 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/p>\n<div   id="j6sjwn9j3u"    style=\"font-size: 14pt; color: white; background-color: black; border-left: red 10px solid; padding-left: 14px; margin-bottom: 20px; margin-top: 20px;\"><strong><strong>4. \u8fb9\u754c\u5339\u914d<\/strong><\/strong><\/div>\n<ol>\n<li>^ - \u4ee3\u8868\u5339\u914d\u5b57\u7b26\u4e32\u7684\u5f00\u5934<\/li>\n<li>$ - \u4ee3\u8868\u5339\u914d\u5b57\u7b26\u4e32\u7684\u7ed3\u5c3e<\/li>\n<\/ol>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-165704\" src=\"https:\/\/lrxjmw.cn\/wp-content\/uploads\/2019\/12\/33.png\" alt=\"\" width=\"600\" height=\"536\" srcset=\"https:\/\/lrxjmw.cn\/wp-content\/uploads\/2019\/12\/33.png 600w, https:\/\/lrxjmw.cn\/wp-content\/uploads\/2019\/12\/33-300x268.png 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/p>\n<div   id="j6sjwn9j3u"    style=\"font-size: 14pt; color: white; background-color: black; border-left: red 10px solid; padding-left: 14px; margin-bottom: 20px; margin-top: 20px;\"><strong><strong>5. \u5b57\u7b26\u5339\u914d<\/strong><\/strong><\/div>\n<ol>\n<li>. - \u53ef\u4ee5\u5339\u914d\u9664\u4e86\u6362\u884c\u7b26\u5916\u7684\u4efb\u610f\u5b57\u7b26<\/li>\n<li>\\d - \u53ef\u4ee5\u5339\u914d\u4efb\u610f\u6570\u5b57<\/li>\n<li>\\D - \u53ef\u4ee5\u5339\u914d\u4efb\u610f\u975e\u6570\u5b57<\/li>\n<li>\\s - \u5339\u914d\u4efb\u610f\u7a7a\u767d\u5b57\u7b26<\/li>\n<li>\\S - \u5339\u914d\u4efb\u610f\u975e\u7a7a\u767d\u5b57\u7b26<\/li>\n<li>\\n - \u5339\u914d\u6362\u884c<\/li>\n<li>\\w - \u5b83\u5176\u5b9e\u5c31\u7b49\u540c\u4e8e [A-Za-z0-9_]\uff0c\u5373\u5339\u914d\u5b57\u6bcd\u6570\u5b57\u4e0b\u5212\u7ebf<\/li>\n<\/ol>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-165705\" src=\"https:\/\/lrxjmw.cn\/wp-content\/uploads\/2019\/12\/34.png\" alt=\"\" width=\"600\" height=\"429\" srcset=\"https:\/\/lrxjmw.cn\/wp-content\/uploads\/2019\/12\/34.png 600w, https:\/\/lrxjmw.cn\/wp-content\/uploads\/2019\/12\/34-300x215.png 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/p>\n<div   id="j6sjwn9j3u"    style=\"font-size: 14pt; color: white; background-color: black; border-left: red 10px solid; padding-left: 14px; margin-bottom: 20px; margin-top: 20px;\"><strong><strong>6. \u91cf\u8bcd\u5339\u914d<\/strong><\/strong><\/div>\n<ol>\n<li>* - \u5339\u914d 0 \u6b21\u6216\u591a\u6b21<\/li>\n<li>+ - \u5339\u914d 1 \u6b21\u6216\u591a\u6b21<\/li>\n<li>? - \u5339\u914d 0 \u6b21\u6216 1 \u6b21<\/li>\n<li>{3} - \u5339\u914d 3 \u6b21<\/li>\n<li>{2,4} - \u5339\u914d 2\u30013 \u6216 4 \u6b21<\/li>\n<li>{2,} - \u5339\u914d 2 \u6b21\u6216\u591a\u6b21<\/li>\n<\/ol>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-165706\" src=\"https:\/\/lrxjmw.cn\/wp-content\/uploads\/2019\/12\/35.png\" alt=\"\" width=\"600\" height=\"557\" srcset=\"https:\/\/lrxjmw.cn\/wp-content\/uploads\/2019\/12\/35.png 600w, https:\/\/lrxjmw.cn\/wp-content\/uploads\/2019\/12\/35-300x279.png 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/p>\n<div   id="j6sjwn9j3u"    style=\"font-size: 14pt; color: white; background-color: black; border-left: red 10px solid; padding-left: 14px; margin-bottom: 20px; margin-top: 20px;\"><strong><strong>7. \u5206\u7ec4<\/strong><\/strong><\/div>\n<p>() \u5c0f\u62ec\u53f7\u5728\u6b63\u5219\u4e2d\u4ee3\u8868\u5206\u7ec4\uff0c\u4e00\u822c\u5728 match \u65b9\u6cd5\u4e2d\u7528\u6765\u8fd4\u56de\u5168\u5339\u914d\u52a0\u4e0a\u591a\u4e2a\u5206\u7ec4\u7ed3\u679c\uff0c\u5982\u679c\u4f7f\u7528\u4e86 g \u9009\u9879\uff0c\u5219\u53ea\u8fd4\u56de\u5168\u5339\u914d\u3002<\/p>\n<p>\u5728\u5c0f\u62ec\u53f7\u4e2d\u4f60\u53ef\u4ee5\u4f7f\u7528\u7ba1\u9053\u7b26\u53f7 |\uff0c\u5b83\u4ee3\u8868\u6216<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-165707\" src=\"https:\/\/lrxjmw.cn\/wp-content\/uploads\/2019\/12\/36.png\" alt=\"\" width=\"600\" height=\"318\" srcset=\"https:\/\/lrxjmw.cn\/wp-content\/uploads\/2019\/12\/36.png 600w, https:\/\/lrxjmw.cn\/wp-content\/uploads\/2019\/12\/36-300x159.png 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/p>\n<div   id="j6sjwn9j3u"    style=\"font-size: 14pt; color: white; background-color: black; border-left: red 10px solid; padding-left: 14px; margin-bottom: 20px; margin-top: 20px;\"><strong><strong>8. \u7279\u6b8a\u5b57\u7b26<\/strong><\/strong><\/div>\n<p>\u5339\u914d\u7279\u6b8a\u7b26\u53f7\u7684\u65f6\u5019\u9700\u8981\u52a0\u53cd\u659c\u6760 \\<\/p>\n<p>JS \u4e2d\u7684\u7279\u6b8a\u5b57\u7b26\u6709 ^ $ \\ . * + ? () [] {} |<\/p>\n<p>\u6240\u4ee5\u5982\u679c\u4f60\u9700\u8981\u5339\u914d\u661f\u53f7 *\uff0c\u5c31\u9700\u8981\u8fd9\u6837\u5199\uff1a<\/p>\n<p>\\*<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-165708\" src=\"https:\/\/lrxjmw.cn\/wp-content\/uploads\/2019\/12\/37.png\" alt=\"\" width=\"600\" height=\"360\" srcset=\"https:\/\/lrxjmw.cn\/wp-content\/uploads\/2019\/12\/37.png 600w, https:\/\/lrxjmw.cn\/wp-content\/uploads\/2019\/12\/37-300x180.png 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/p>\n<div   id="j6sjwn9j3u"    style=\"font-size: 14pt; color: white; background-color: black; border-left: red 10px solid; padding-left: 14px; margin-bottom: 20px; margin-top: 20px;\"><strong><strong>9. \u53d6\u975e\u5339\u914d<\/strong><\/strong><\/div>\n<p>\u5339\u914d\u9664\u4e86\u67d0\u4e2a\u5b57\u7b26\u7684\u4efb\u610f\u5b57\u7b26\uff0c\u9700\u8981\u5728\u4e2d\u62ec\u53f7[] \u4e2d\u4f7f\u7528 ^<\/p>\n<p>\u81f3\u6b64 ^ \u5177\u6709\u4e24\u4e2a\u542b\u4e49\uff1a<\/p>\n<ol>\n<li>\u5982\u679c\u7528\u4e8e\u6b63\u5219\u8868\u8fbe\u5f0f\u7684\u5f00\u5934\uff0c\u4ee3\u8868\u5339\u914d\u5b57\u7b26\u4e32\u7684\u5f00\u5934<\/li>\n<li>\u5982\u679c\u7528\u4e8e\u4e2d\u62ec\u53f7 [] \u5185\u90e8\uff0c\u5219\u4ee3\u8868\u5339\u914d\u975e\u6b64\u5b57\u7b26<\/li>\n<\/ol>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-165709\" src=\"https:\/\/lrxjmw.cn\/wp-content\/uploads\/2019\/12\/38.png\" alt=\"\" width=\"600\" height=\"302\" srcset=\"https:\/\/lrxjmw.cn\/wp-content\/uploads\/2019\/12\/38.png 600w, https:\/\/lrxjmw.cn\/wp-content\/uploads\/2019\/12\/38-300x151.png 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/p>\n<div   id="j6sjwn9j3u"    style=\"font-size: 14pt; color: white; background-color: black; border-left: red 10px solid; padding-left: 14px; margin-bottom: 20px; margin-top: 20px;\"><strong><strong>10. \u5b8c<\/strong><\/strong><\/div>\n<p>\u4e0a\u9762\u53ea\u662f\u4ecb\u7ecd\u4e86\u6b63\u5219\u8868\u8fbe\u5f0f\u4e2d\u7684\u57fa\u672c\u7528\u6cd5\uff0c\u5728\u65e5\u5e38\u5f00\u53d1\u4e2d\u57fa\u672c\u5c31\u591f\u7528\u4e86\u3002\u66f4\u6df1\u5165\u7684\u7528\u6cd5\u6bd4\u5982 \u8d2a\u5a6a\u548c\u61d2\u60f0\u3001\u96f6\u5bbd\u65ad\u8a00 \u548c \u6355\u83b7 \uff0c\u611f\u5174\u8da3\u7684\u5c0f\u4f19\u4f34\u53ef\u4ee5\u81ea\u884c\u5b66\u4e60~<\/p>\n<p>\u6b63\u5219\u5f88\u5f3a\u5927\uff0c\u4f46\u662f\u4e5f\u4e0d\u80fd\u6ee5\u7528\u3002\u5982\u679c\u4f60\u5199\u51fa\u4e86\u4e00\u4e2a\u5f88\u590d\u6742\u7684\u53ea\u6709\u4f60\u80fd\u770b\u61c2\u7684\u6b63\u5219\uff0c\u66f4\u597d\u7684\u505a\u6cd5\u662f\u4e0d\u4f7f\u7528\u6b63\u5219\u53bb\u5b9e\u73b0\u5b83~<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728 JavaScript \u4e2d\uff0c\u4f7f\u7528 \/\/ \u5373\u53ef\u521b\u5efa\u4e00\u4e2a\u6b63\u5219\u8868\u8fbe\u5f0f\u5bf9\u8c61\uff0c\u5f53\u7136\u4e5f\u53ef\u4ee5\u4f7f\u7528 new RegExp() [&hellip;]<\/p>\n","protected":false},"author":1898,"featured_media":165710,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[55],"tags":[471],"class_list":["post-165700","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-thread","tag-471"],"acf":[],"_links":{"self":[{"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/posts\/165700","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/users\/1898"}],"replies":[{"embeddable":true,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/comments?post=165700"}],"version-history":[{"count":2,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/posts\/165700\/revisions"}],"predecessor-version":[{"id":165712,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/posts\/165700\/revisions\/165712"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/media\/165710"}],"wp:attachment":[{"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/media?parent=165700"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/categories?post=165700"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/tags?post=165700"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}