{"id":946,"date":"2022-05-28T22:53:43","date_gmt":"2022-05-28T14:53:43","guid":{"rendered":"http:\/\/blog.xtaa.cn\/?p=946"},"modified":"2022-05-28T22:53:43","modified_gmt":"2022-05-28T14:53:43","slug":"%e6%ad%a3%e5%88%99%e8%a1%a8%e8%be%be%e5%bc%8f%e5%b8%b8%e7%94%a8%e7%89%b9%e6%ae%8a%e5%ad%97%e7%ac%a6%e5%92%8c%e7%ac%a6%e5%8f%b7","status":"publish","type":"post","link":"http:\/\/blog.xtaa.cn\/index.php\/2022\/05\/28\/%e6%ad%a3%e5%88%99%e8%a1%a8%e8%be%be%e5%bc%8f%e5%b8%b8%e7%94%a8%e7%89%b9%e6%ae%8a%e5%ad%97%e7%ac%a6%e5%92%8c%e7%ac%a6%e5%8f%b7\/","title":{"rendered":"\u6b63\u5219\u8868\u8fbe\u5f0f\u5e38\u7528\u7279\u6b8a\u5b57\u7b26\u548c\u7b26\u53f7"},"content":{"rendered":"\n

\u5e38\u7528\u7279\u6b8a\u5b57\u7b26\u548c\u7b26\u53f7<\/strong><\/p>\n\n\n\n

0.\u62e9\u4e00\u5339\u914d         \uff08|\uff09<\/strong><\/p>\n\n\n\n

|  \u4ece\u591a\u4e2a\u6a21\u5f0f\u4e2d\u9009\u62e9\u5176\u4e00\uff0c\u7c7b\u4f3c\u4e8e\u903b\u8f91\u6216\uff0c\u4f8b\u5982\uff1a<\/p>\n\n\n\n

\u3000\u3000\u3000\u3000\u3000\u6b63\u5219\u8868\u8fbe\u5f0f<\/td>            \u5339\u914d\u7684\u5b57\u7b26\u4e32<\/td><\/tr>
\u3000\u3000\u3000\u3000\u3000apple|orange<\/td>\u3000\u3000\u3000\u3000apple,orange<\/td><\/tr>
            cpp|java|python<\/td>          cpp,java,python<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

1.\u4efb\u610f\u5339\u914d\u5355\u4e2a\u5b57\u7b26         \uff08.\uff09<\/strong><\/p>\n\n\n\n

. \u5339\u914d\u9664\u4e86\u6362\u884c\u7b26\\n<\/strong>\u4ee5\u5916\u7684\u4efb\u610f\u5b57\u7b26\uff0c\u4f8b\u5982\uff1a<\/p>\n\n\n\n

\u3000\u3000\u3000\u3000\u3000\u6b63\u5219\u8868\u8fbe\u5f0f<\/td>            \u5339\u914d\u7684\u5b57\u7b26\u4e32<\/td><\/tr>
\u3000\u3000\u3000\u3000\u3000a.c<\/td>\u3000\u3000\u3000\u3000a(\u4efb\u610f\u5b57\u7b26)c<\/td><\/tr>
               ..<\/td>             \u4efb\u610f\u4e24\u4e2a\u5b57\u7b26<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

2.\u4ece\u5b57\u7b26\u4e32\u5f00\u59cb\u6216\u7ed3\u5c3e\u6216\u5355\u8bcd\u8fb9\u754c\u5339\u914d\uff08^\uff09     ($)     \uff08\\b\uff09       (\\B)<\/strong><\/p>\n\n\n\n

^\u6216\\A\u63a5\u5b57\u7b26\u4e32\uff0c\u8868\u793a\u4ee5\u8be5\u5b57\u7b26\u4e32\u5f00\u59cb(\u533a\u522b\uff1a^\u5339\u914d\u4e00\u884c\u7684\u5f00\u59cb\uff0c\\A\u5339\u914d\u8f93\u5165\u7684\u5f00\u59cb)<\/p>\n\n\n\n

$\u6216\\Z\u63a5\u5b57\u7b26\u4e32\uff0c\u8868\u793a\u4ee5\u8be5\u5b57\u7b26\u4e32\u7ed3\u5c3e\uff08\u540c\u4e0a\uff09<\/p>\n\n\n\n

\\b\u63a5\u5b57\u7b26\u4e32\uff0c\u8868\u793a\u4ee5\u8be5\u5b57\u7b26\u4e32\u5f00\u59cb\uff08\u533a\u522b\u4e8e^\u548c\\A\uff1a\u5339\u914d\u4e00\u4e2a\u5355\u8bcd\u8d77\u59cb\u90e8\u5206\uff0c\u4e0d\u7ba1\u8be5\u5355\u8bcd\u524d\u9762\u662f\u5426\u6709\u4efb\u4f55\u5b57\u7b26\u3002\u901a\u4fd7\u6765\u8bf4\uff1a^\u5339\u914d\u5b57\u7b26\u4e32\u7684\u5f00\u59cb\uff0c\\b\u5339\u914d\u5355\u8bcd\u7684\u5f00\u59cb\uff09<\/p>\n\n\n\n

\\B\u63a5\u5b57\u7b26\u4e32\uff0c\u8868\u793a\u4ee5\u8be5\u5b57\u7b26\u4e32\u4e3a\u5b50\u4e32\u4f46\u4e0d\u662f\u8fb9\u754c<\/p>\n\n\n\n

\u3000\u3000\u3000\u3000\u3000\u6b63\u5219\u8868\u8fbe\u5f0f<\/td>            \u5339\u914d\u7684\u5b57\u7b26\u4e32<\/td><\/tr>
\u3000\u3000\u3000\u3000\u3000^in<\/td>  \u3000\u3000\u3000\u3000\u4efb\u4f55\u4ee5in\u5f00\u5934\u7684\u5b57\u7b26\u4e32<\/td><\/tr>
               com$<\/td>              \u4efb\u4f55\u4ee5com\u7ed3\u5c3e\u7684\u5b57\u7b26\u4e32<\/td><\/tr>
                the<\/td>\u3000\u3000\u3000\u3000\u3000\u4efb\u4f55\u5305\u542bthe\u7684\u5b57\u7b26\u4e32<\/td><\/tr>
\u3000\u3000\u3000\u3000\u3000\\bthe<\/td>  \u3000\u3000\u3000\u3000\u4efb\u4f55\u4ee5the\u5f00\u59cb\u7684\u5b57\u7b26\u4e32<\/td><\/tr>
\u3000\u3000\u3000\u3000\u3000\\bthe\\b<\/td>             \u5355\u8bcdzhe<\/td><\/tr>
\u3000\u3000\u3000\u3000\u3000\\Bthe<\/td>             \u4efb\u4f55\u5305\u542b\u4f46\u4e0d\u4ee5the\u5f00\u59cb\u7684\u5b57\u7b26\u4e32<\/td><\/tr>
\u3000\u3000\u3000\u3000\u3000the\\B<\/td>             \u4efb\u4f55\u5305\u542b\u4f46\u4e0d\u4ee5the\u7ed3\u5c3e\u7684\u5b57\u7b26\u4e32<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

3.\u521b\u5efa\u5b57\u7b26\u96c6\uff0c\u7c7b\u4f3c\u4e8e\u62e9\u4e00\u5339\u914d     \uff08[]\uff09<\/strong><\/p>\n\n\n\n

([])\u7528\u4e8e\u5339\u914d\u67d0\u4e9b\u7279\u5b9a\u5b57\u7b26\uff0c\u533a\u522b\u4e8e\uff08.\uff09\u5339\u914d\u4efb\u610f\u5b57\u7b26\uff0c\u5339\u914d\u65b9\u62ec\u53f7\u4e2d\u5305\u542b\u7684\u4efb\u610f\u5b57\u7b26\u3002<\/p>\n\n\n\n

\u3000\u3000\u3000\u3000\u3000\u6b63\u5219\u8868\u8fbe\u5f0f<\/td>            \u5339\u914d\u7684\u5b57\u7b26\u4e32<\/td><\/tr>
\u3000\u3000\u3000\u3000\u3000c[abcd]d<\/td>\u3000\u3000\u3000\u3000cad,cbd,ccd,cdd<\/td><\/tr>
            [cp][jv][py]<\/td>          cjp,pjp,cvp,cvy,pjp,pjy<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

4.\u9650\u5b9a\u8303\u56f4\u6216\u5426\u5b9a\u3000\u3000\uff08-\uff09  \uff08[^]\uff09<\/strong><\/p>\n\n\n\n

\u65b9\u62ec\u53f7\u4e2d\u4e24\u4e2a\u5b57\u7b26\u4ee5-\u7b26\u53f7\u8fde\u63a5\u8868\u793a\u6307\u5b9a\u4e00\u4e2a\u8303\u56f4\uff0c\u5728\u8fde\u63a5\u7684\u5b57\u7b26\u4e4b\u4e2d\u3002<\/p>\n\n\n\n

\u65b9\u62ec\u53f7\u4e2d\u7d27\u7d27\u8fde\u63a5^\u7b26\u53f7\u8868\u793a\u4e0d\u5339\u914d\u7ed9\u5b9a\u5b57\u7b26\u96c6\u4efb\u4e00\u5b57\u7b26<\/p>\n\n\n\n

\u3000\u3000\u3000\u3000\u6b63\u5219\u8868\u8fbe\u5f0f<\/td>            \u5339\u914d\u7684\u5b57\u7b26\u4e32<\/td><\/tr>
\u3000\u3000\u3000\u3000[a-c][d-f]<\/td>\u3000\u3000\u3000\u3000ad,ae,af,bd,be,bf,cd,ce,cf,<\/td><\/tr>
            [^aeiou]<\/td>          \u4e00\u4e2a\u975e\u5143\u97f3\u5b57\u7b26<\/td><\/tr>
           [^\\t\\n]<\/td>           \u4e0d\u5339\u914d\u5236\u8868\u7b26\u6216\u6362\u884c\u7b26<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

5.\u96f6\u6b21\uff0c\u4e00\u6b21\u6216\u591a\u6b21\u5339\u914d(*)    (+)    (?)  \uff1b\u9891\u6570\u5339\u914d   {M}    {M,N}    {M,}<\/strong><\/p>\n\n\n\n

*\u5c06\u5339\u914d\u5176\u5de6\u8fb9\u7684\u6b63\u5219\u8868\u8fbe\u5f0f\u51fa\u73b0\u96f6\u6b21\u6216\u591a\u6b21\u7684\u60c5\u51b5\u3002<\/p>\n\n\n\n

+\u5c06\u5339\u914d\u5176\u5de6\u8fb9\u7684\u6b63\u5219\u8868\u8fbe\u5f0f\u51fa\u73b0\u4e00\u6b21\u6216\u591a\u6b21\u7684\u60c5\u51b5\u3002<\/p>\n\n\n\n

\uff1f\u5c06\u5339\u914d\u5176\u5de6\u8fb9\u7684\u6b63\u5219\u8868\u8fbe\u5f0f\u51fa\u73b0\u96f6\u6b21\u6216\u4e00\u6b21\u7684\u60c5\u51b5\u3002<\/p>\n\n\n\n

{M}\u5c06\u5339\u914d\u5176\u5de6\u8fb9\u7684\u6b63\u5219\u8868\u8fbe\u5f0f\u51fa\u73b0M\u6b21\u7684\u60c5\u51b5\u3002<\/p>\n\n\n\n

{M,N}\u5c06\u5339\u914d\u5176\u5de6\u8fb9\u7684\u6b63\u5219\u8868\u8fbe\u5f0f\u51fa\u73b0M\u5230N\u6b21\u7684\u60c5\u51b5\u3002<\/p>\n\n\n\n

{M,}\u5c06\u5339\u914d\u5176\u5de6\u8fb9\u7684\u6b63\u5219\u8868\u8fbe\u5f0f\u51fa\u73b0M\u6b21\u6216\u66f4\u591a\u6b21\u7684\u60c5\u51b5\u3002<\/p>\n\n\n\n

\u3000\u3000\u3000\u3000\u6b63\u5219\u8868\u8fbe\u5f0f<\/td>            \u5339\u914d\u7684\u5b57\u7b26\u4e32<\/td><\/tr>
\u3000\u3000\u3000\u3000dog?<\/td>\u3000\u3000\u3000\u3000dog,do<\/td><\/tr>
           dog*<\/td>           do,dog,dogg,doggg,….do\u4efb\u610f\u4e2ag<\/td><\/tr>
           dog+<\/td>           dog,dogg,doggg,….dog\u4efb\u610f\u4e2ag<\/td><\/tr>
           dog{5}<\/td>           doggggg<\/td><\/tr>
           dog{2,3}<\/td>           dogg,doggg<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

 6.\u8868\u793a\u5b57\u7b26\u96c6\u7684\u7279\u6b8a\u5b57\u7b26   \uff08\\w\uff09(\\d)   (\\s)<\/strong><\/p>\n\n\n\n

\\w  \u5339\u914d\u4efb\u4f55\u5b57\u6bcd\u6570\u5b57\u4e0b\u5212\u7ebf\u5b57\u7b26<\/p>\n\n\n\n

\\d   \u5339\u914d\u4efb\u4f55\u5341\u8fdb\u5236\u6570\u5b57<\/p>\n\n\n\n

\\s  \u5339\u914d\u4efb\u610f\u7a7a\u683c\u5b57\u7b26<\/p>\n\n\n\n

\u3000\u3000\u3000\u3000\u6b63\u5219\u8868\u8fbe\u5f0f<\/td>            \u5339\u914d\u7684\u5b57\u7b26\u4e32<\/td><\/tr>
\u3000\u3000\u3000\u3000\\w+<\/td>\u3000\u3000\u3000\u3000\u4e00\u4e32\u7531\u5b57\u6bcd\u6570\u5b57\u7ec4\u6210\u7684\u5b57\u7b26\u4e32<\/td><\/tr>
           \\d{3}-\\d{3}-d{4}<\/td>           \u7f8e\u56fd\u7535\u8bdd\u53f7\u7801\u5f62\u5f0f\uff0c\u5982800-555-1212<\/td><\/tr>
           \\w+@\\w+\\.com<\/td>          xxx@yyy.com\u5f62\u5f0f\u7684\u7535\u5b50\u90ae\u4ef6\u5730\u5740<\/td><\/tr>
           \\s<\/td>          \u4e0e[\\n\\r\\t\\v\\f]\u76f8\u540c\uff0c\u4e0e\\S\u76f8\u53cd<\/td><\/tr><\/tbody><\/table><\/figure>\n","protected":false},"excerpt":{"rendered":"

\u5e38\u7528\u7279\u6b8a\u5b57\u7b26\u548c\u7b26\u53f7 0.\u62e9\u4e00\u5339\u914d         \uff08|\uff09 | […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10],"tags":[],"class_list":["post-946","post","type-post","status-publish","format-standard","hentry","category-10"],"_links":{"self":[{"href":"http:\/\/blog.xtaa.cn\/index.php\/wp-json\/wp\/v2\/posts\/946","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/blog.xtaa.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/blog.xtaa.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/blog.xtaa.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/blog.xtaa.cn\/index.php\/wp-json\/wp\/v2\/comments?post=946"}],"version-history":[{"count":0,"href":"http:\/\/blog.xtaa.cn\/index.php\/wp-json\/wp\/v2\/posts\/946\/revisions"}],"wp:attachment":[{"href":"http:\/\/blog.xtaa.cn\/index.php\/wp-json\/wp\/v2\/media?parent=946"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/blog.xtaa.cn\/index.php\/wp-json\/wp\/v2\/categories?post=946"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/blog.xtaa.cn\/index.php\/wp-json\/wp\/v2\/tags?post=946"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}