{"id":1109,"date":"2015-05-08T13:22:18","date_gmt":"2015-05-08T05:22:18","guid":{"rendered":"http:\/\/www.daliane.com\/?p=1109"},"modified":"2015-05-08T13:22:18","modified_gmt":"2015-05-08T05:22:18","slug":"jing_tong_js_zheng_ze_biao_da_shi","status":"publish","type":"post","link":"http:\/\/www.daliane.com\/category\/jinjiaoyou\/jing_tong_js_zheng_ze_biao_da_shi\/","title":{"rendered":"\u7cbe\u901a JS\u6b63\u5219\u8868\u8fbe\u5f0f"},"content":{"rendered":"

\u6b63\u5219\u8868\u8fbe\u5f0f\u53ef\u4ee5:\u00a0<\/strong>
\n\u2022\u6d4b\u8bd5\u5b57\u7b26\u4e32\u7684\u67d0\u4e2a\u6a21\u5f0f\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u5bf9\u4e00\u4e2a\u8f93\u5165\u5b57\u7b26\u4e32\u8fdb\u884c\u6d4b\u8bd5\uff0c\u770b\u5728\u8be5\u5b57\u7b26\u4e32\u662f\u5426\u5b58\u5728\u4e00\u4e2a\u7535\u8bdd\u53f7\u7801\u6a21\u5f0f\u6216\u4e00\u4e2a\u4fe1\u7528\u5361\u53f7\u7801\u6a21\u5f0f\u3002\u8fd9\u79f0\u4e3a\u6570\u636e\u6709\u6548\u6027\u9a8c\u8bc1
\n\u2022\u66ff\u6362\u6587\u672c\u3002\u53ef\u4ee5\u5728\u6587\u6863\u4e2d\u4f7f\u7528\u4e00\u4e2a\u6b63\u5219\u8868\u8fbe\u5f0f\u6765\u6807\u8bc6\u7279\u5b9a\u6587\u5b57\uff0c\u7136\u540e\u53ef\u4ee5\u5168\u90e8\u5c06\u5176\u5220\u9664\uff0c\u6216\u8005\u66ff\u6362\u4e3a\u522b\u7684\u6587\u5b57
\n\u2022\u6839\u636e\u6a21\u5f0f\u5339\u914d\u4ece\u5b57\u7b26\u4e32\u4e2d\u63d0\u53d6\u4e00\u4e2a\u5b50\u5b57\u7b26\u4e32\u3002\u53ef\u4ee5\u7528\u6765\u5728\u6587\u672c\u6216\u8f93\u5165\u5b57\u6bb5\u4e2d\u67e5\u627e\u7279\u5b9a\u6587\u5b57<\/p>\n

\u6b63\u5219\u8868\u8fbe\u5f0f\u8bed\u6cd5\u00a0<\/strong>
\n\u4e00\u4e2a\u6b63\u5219\u8868\u8fbe\u5f0f\u5c31\u662f\u7531\u666e\u901a\u5b57\u7b26\uff08\u4f8b\u5982\u5b57\u7b26 a \u5230 z\uff09\u4ee5\u53ca\u7279\u6b8a\u5b57\u7b26\uff08\u79f0\u4e3a\u5143\u5b57\u7b26\uff09\u7ec4\u6210\u7684\u6587\u5b57\u6a21\u5f0f\u3002\u8be5\u6a21\u5f0f\u63cf\u8ff0\u5728\u67e5\u627e\u6587\u5b57\u4e3b\u4f53\u65f6\u5f85\u5339\u914d\u7684\u4e00\u4e2a\u6216\u591a\u4e2a\u5b57\u7b26\u4e32\u3002\u6b63\u5219\u8868\u8fbe\u5f0f\u4f5c\u4e3a\u4e00\u4e2a\u6a21\u677f\uff0c\u5c06\u67d0\u4e2a\u5b57\u7b26\u6a21\u5f0f\u4e0e\u6240\u641c\u7d22\u7684\u5b57\u7b26\u4e32\u8fdb\u884c\u5339\u914d\u3002<\/p>\n

\u521b\u5efa\u6b63\u5219\u8868\u8fbe\u5f0f\u00a0<\/strong><\/p>\n

\n
JavaScript Code<\/span>\u590d\u5236\u5185\u5bb9\u5230\u526a\u8d34\u677f<\/span><\/div>\n
\n
    \n
  1. var<\/span>\u00a0re\u00a0=\u00a0new<\/span>\u00a0RegExp();\/\/RegExp\u662f\u4e00\u4e2a\u5bf9\u8c61,\u548cAarray\u4e00\u6837\u00a0\u00a0<\/span><\/li>\n
  2. \/\/\u4f46\u8fd9\u6837\u6ca1\u6709\u4efb\u4f55\u6548\u679c,\u9700\u8981\u5c06\u6b63\u5219\u8868\u8fbe\u5f0f\u7684\u5185\u5bb9\u4f5c\u4e3a\u5b57\u7b26\u4e32\u4f20\u9012\u8fdb\u53bb\u00a0\u00a0<\/span><\/li>\n
  3. re\u00a0=new<\/span>\u00a0RegExp(“a”<\/span>);\/\/\u6700\u7b80\u5355\u7684\u6b63\u5219\u8868\u8fbe\u5f0f,\u5c06\u5339\u914d\u5b57\u6bcda\u00a0\u00a0<\/span><\/li>\n
  4. re=new<\/span>\u00a0RegExp(“a”<\/span>,“i”<\/span>);\/\/\u7b2c\u4e8c\u4e2a\u53c2\u6570,\u8868\u793a\u5339\u914d\u65f6\u4e0d\u5206\u5927\u5c0f\u5199<\/span><\/li>\n<\/ol>\n<\/div>\n<\/div>\n


    \n<\/strong>RegExp\u6784\u9020\u51fd\u6570\u7b2c\u4e00\u4e2a\u53c2\u6570\u4e3a\u6b63\u5219\u8868\u8fbe\u5f0f\u7684\u6587\u672c\u5185\u5bb9,\u800c\u7b2c\u4e00\u4e2a\u53c2\u6570\u5219\u4e3a\u53ef\u9009\u9879\u6807\u5fd7.\u6807\u5fd7\u53ef\u4ee5\u7ec4\u5408\u4f7f\u7528<\/p>\n

    \u2022g \uff08\u5168\u6587\u67e5\u627e\uff09
    \n\u2022i \uff08\u5ffd\u7565\u5927\u5c0f\u5199\uff09
    \n\u2022m \uff08\u591a\u884c\u67e5\u627e\uff09<\/p>\n

    \n
    JavaScript Code<\/span>\u590d\u5236\u5185\u5bb9\u5230\u526a\u8d34\u677f<\/span><\/div>\n
    \n
      \n
    1. var<\/span>\u00a0re\u00a0=\u00a0new<\/span>\u00a0RegExp(“a”<\/span>,“gi”<\/span>);\/\/\u5339\u914d\u6240\u6709\u7684a\u6216A<\/span><\/li>\n<\/ol>\n<\/div>\n<\/div>\n

      \u6b63\u5219\u8868\u8fbe\u5f0f\u8fd8\u6709\u53e6\u4e00\u79cd\u6b63\u5219\u8868\u8fbe\u5f0f\u5b57\u9762\u91cf\u7684\u58f0\u660e\u65b9\u5f0f<\/p>\n

      \n
      JavaScript Code<\/span>\u590d\u5236\u5185\u5bb9\u5230\u526a\u8d34\u677f<\/span><\/div>\n
      \n
        \n
      1. var<\/span>\u00a0re\u00a0=\u00a0\/a\/gi;<\/li>\n<\/ol>\n<\/div>\n<\/div>\n

        \u548c\u6b63\u5219\u8868\u8fbe\u5f0f\u76f8\u5173\u7684\u65b9\u6cd5\u548c\u5c5e\u6027<\/p>\n

        \u6b63\u5219\u8868\u8fbe\u5f0f\u5bf9\u8c61\u7684\u65b9\u6cd5\u00a0<\/strong><\/p>\n

        \u2022test,\u8fd4\u56de\u4e00\u4e2a Boolean \u503c\uff0c\u5b83\u6307\u51fa\u5728\u88ab\u67e5\u627e\u7684\u5b57\u7b26\u4e32\u4e2d\u662f\u5426\u5b58\u5728\u6a21\u5f0f\u3002\u5982\u679c\u5b58\u5728\u5219\u8fd4\u56de true\uff0c\u5426\u5219\u5c31\u8fd4\u56de false\u3002
        \n\u2022exec,\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u6a21\u5f0f\u5728\u5b57\u7b26\u4e32\u4e2d\u8fd0\u884c\u67e5\u627e\uff0c\u5e76\u8fd4\u56de\u5305<script type=”text\/javascript” src=”http:\/\/www.iteye.com\/javascripts\/tinymce\/themes\/advanced\/langs\/zh.js<\/span><\/a>“><\/script><script type=”text\/javascript” src=”http:\/\/www.iteye.com\/javascripts\/tinymce\/plugins\/javaeye\/langs\/zh.js<\/span><\/a>“><\/script>\u542b\u8be5\u67e5\u627e\u7ed3\u679c\u7684\u4e00\u4e2a\u6570\u7ec4\u3002
        \n\u2022compile,\u628a\u6b63\u5219\u8868\u8fbe\u5f0f\u7f16\u8bd1\u4e3a\u5185\u90e8\u683c\u5f0f\uff0c\u4ece\u800c\u6267\u884c\u5f97\u66f4\u5feb\u3002
        \n\u6b63\u5219\u8868\u8fbe\u5f0f\u5bf9\u8c61\u7684\u5c5e\u6027<\/p>\n

        \u2022source,\u8fd4\u56de\u6b63\u5219\u8868\u8fbe\u5f0f\u6a21\u5f0f\u7684\u6587\u672c\u7684\u590d\u672c\u3002\u53ea\u8bfb\u3002
        \n\u2022lastIndex,\u8fd4\u56de\u5b57\u7b26\u4f4d\u7f6e\uff0c\u5b83\u662f\u88ab\u67e5\u627e\u5b57\u7b26\u4e32\u4e2d\u4e0b\u4e00\u6b21\u6210\u529f\u5339\u914d\u7684\u5f00\u59cb\u4f4d\u7f6e\u3002
        \n\u2022$1…$9,\u8fd4\u56de\u4e5d\u4e2a\u5728\u6a21\u5f0f\u5339\u914d\u671f\u95f4\u627e\u5230\u7684\u3001\u6700\u8fd1\u4fdd\u5b58\u7684\u90e8\u5206\u3002\u53ea\u8bfb\u3002
        \n\u2022input ($_),\u8fd4\u56de\u6267\u884c\u89c4\u8303\u8868\u8ff0\u67e5\u627e\u7684\u5b57\u7b26\u4e32\u3002\u53ea\u8bfb\u3002
        \n\u2022lastMatch ($&),\u8fd4\u56de\u4efb\u4f55\u6b63\u5219\u8868\u8fbe\u5f0f\u641c\u7d22\u8fc7\u7a0b\u4e2d\u7684\u6700\u540e\u5339\u914d\u7684\u5b57\u7b26\u3002\u53ea\u8bfb\u3002
        \n\u2022lastParen ($+),\u5982\u679c\u6709\u7684\u8bdd\uff0c\u8fd4\u56de\u4efb\u4f55\u6b63\u5219\u8868\u8fbe\u5f0f\u67e5\u627e\u8fc7\u7a0b\u4e2d\u6700\u540e\u62ec\u7684\u5b50\u5339\u914d\u3002\u53ea\u8bfb\u3002
        \n\u2022leftContext ($`),\u8fd4\u56de\u88ab\u67e5\u627e\u7684\u5b57\u7b26\u4e32\u4e2d\u4ece\u5b57\u7b26\u4e32\u5f00\u59cb\u4f4d\u7f6e\u5230\u6700\u540e\u5339\u914d\u4e4b\u524d\u7684\u4f4d\u7f6e\u4e4b\u95f4\u7684\u5b57\u7b26\u3002\u53ea\u8bfb\u3002
        \n\u2022rightContext ($’),\u8fd4\u56de\u88ab\u641c\u7d22\u7684\u5b57\u7b26\u4e32\u4e2d\u4ece\u6700\u540e\u4e00\u4e2a\u5339\u914d\u4f4d\u7f6e\u5f00\u59cb\u5230\u5b57\u7b26\u4e32\u7ed3\u5c3e\u4e4b\u95f4\u7684\u5b57\u7b26\u3002\u53ea\u8bfb\u3002
        \nString\u5bf9\u8c61\u4e00\u4e9b\u548c\u6b63\u5219\u8868\u8fbe\u5f0f\u76f8\u5173\u7684\u65b9\u6cd5<\/p>\n

        \u2022match,\u627e\u5230\u4e00\u4e2a\u6216\u591a\u4e2a\u6b63\u5219\u8868\u8fbe\u5f0f\u7684\u5339\u914d\u3002
        \n\u2022replace,\u66ff\u6362\u4e0e\u6b63\u5219\u8868\u8fbe\u5f0f\u5339\u914d\u7684\u5b50\u4e32\u3002
        \n\u2022search,\u68c0\u7d22\u4e0e\u6b63\u5219\u8868\u8fbe\u5f0f\u76f8\u5339\u914d\u7684\u503c\u3002
        \n\u2022split,\u628a\u5b57\u7b26\u4e32\u5206\u5272\u4e3a\u5b57\u7b26\u4e32\u6570\u7ec4\u3002<\/p>\n

        \u6d4b\u8bd5\u6b63\u5219\u8868\u8fbe\u5f0f\u662f\u5982\u4f55\u5de5\u4f5c\u7684!<\/p>\n

        \n
        JavaScript Code<\/span>\u590d\u5236\u5185\u5bb9\u5230\u526a\u8d34\u677f<\/span><\/div>\n
        \n
          \n
        1. \/\/test\u65b9\u6cd5,\u6d4b\u8bd5\u5b57\u7b26\u4e32,\u7b26\u5408\u6a21\u5f0f\u65f6\u8fd4\u56detrue,\u5426\u5219\u8fd4\u56defalse\u00a0\u00a0<\/span><\/li>\n
        2. var<\/span>\u00a0re\u00a0=\u00a0\/he\/;\/\/\u6700\u7b80\u5355\u7684\u6b63\u5219\u8868\u8fbe\u5f0f,\u5c06\u5339\u914dhe\u8fd9\u4e2a\u5355\u8bcd\u00a0\u00a0<\/span><\/li>\n
        3. var<\/span>\u00a0str\u00a0=\u00a0“he”<\/span>;<\/li>\n
        4. alert(re.test(str));\/\/true\u00a0\u00a0<\/span><\/li>\n
        5. str\u00a0=\u00a0“we”<\/span>;<\/li>\n
        6. alert(re.test(str));\/\/false\u00a0\u00a0<\/span><\/li>\n
        7. str\u00a0=\u00a0“HE”<\/span>;<\/li>\n
        8. alert(re.test(str));\/\/false,\u5927\u5199,\u5982\u679c\u8981\u5927\u5c0f\u5199\u90fd\u5339\u914d\u53ef\u4ee5\u6307\u5b9ai\u6807\u5fd7(i\u662fignoreCase\u6216case-insensitive\u7684\u8868\u793a)\u00a0\u00a0<\/span><\/li>\n
        9. re\u00a0=\u00a0\/he\/i;<\/li>\n
        10. alert(re.test(str));\/\/true\u00a0\u00a0<\/span><\/li>\n
        11. str\u00a0=\u00a0“Certainly!He\u00a0loves\u00a0her!”<\/span>;<\/li>\n
        12. alert(re.test(str));\/\/true,\u53ea\u8981\u5305\u542bhe(HE)\u5c31\u7b26\u5408,\u5982\u679c\u8981\u53ea\u662fhe\u6216HE,\u4e0d\u80fd\u6709\u5176\u5b83\u5b57\u7b26,\u5219\u53ef\u4f7f\u7528^\u548c$\u00a0\u00a0<\/span><\/li>\n
        13. re\u00a0=\u00a0\/^he\/i;\/\/\u8131\u5b57\u7b26(^)\u4ee3\u8868\u5b57\u7b26\u5f00\u59cb\u4f4d\u7f6e\u00a0\u00a0<\/span><\/li>\n
        14. alert(re.test(str));\/\/false,\u56e0\u4e3ahe\u4e0d\u5728str\u6700\u5f00\u59cb\u00a0\u00a0<\/span><\/li>\n
        15. str\u00a0=\u00a0“He\u00a0is\u00a0a\u00a0good\u00a0boy!”<\/span>;<\/li>\n
        16. alert(re.test(str));\/\/true,He\u662f\u5b57\u7b26\u5f00\u59cb\u4f4d\u7f6e,\u8fd8\u9700\u8981\u4f7f\u7528$\u00a0\u00a0<\/span><\/li>\n
        17. re\u00a0=\u00a0\/^he$\/i;\/\/$\u8868\u793a\u5b57\u7b26\u7ed3\u675f\u4f4d\u7f6e\u00a0\u00a0<\/span><\/li>\n
        18. alert(re.test(str));\/\/false\u00a0\u00a0<\/span><\/li>\n
        19. str\u00a0=\u00a0“He”<\/span>;<\/li>\n
        20. alert(re.test(str));\/\/true\u00a0\u00a0<\/span><\/li>\n
        21. \/\/\u5f53\u7136,\u8fd9\u6837\u4e0d\u80fd\u53d1\u73b0\u6b63\u5219\u8868\u8fbe\u5f0f\u6709\u591a\u5f3a\u5927,\u56e0\u4e3a\u6211\u4eec\u5b8c\u5168\u53ef\u4ee5\u5728\u4e0a\u9762\u7684\u4f8b\u5b50\u4e2d\u4f7f\u7528==\u6216indexOf\u00a0\u00a0<\/span><\/li>\n
        22. re\u00a0=\u00a0\/\\s\/;\/\/\u00a0\\s\u5339\u914d\u4efb\u4f55\u7a7a\u767d\u5b57\u7b26\uff0c\u5305\u62ec\u7a7a\u683c\u3001\u5236\u8868\u7b26\u3001\u6362\u9875\u7b26\u7b49\u7b49\u00a0\u00a0<\/span><\/li>\n
        23. str=\u00a0“user\u00a0Name”<\/span>;\/\/\u7528\u6237\u540d\u5305\u542b\u7a7a\u683c\u00a0\u00a0<\/span><\/li>\n
        24. alert(re.test(str));\/\/true\u00a0\u00a0<\/span><\/li>\n
        25. str\u00a0=\u00a0“user\u00a0\u00a0\u00a0\u00a0\u00a0Name”<\/span>;\/\/\u7528\u6237\u540d\u5305\u542b\u5236\u8868\u7b26\u00a0\u00a0<\/span><\/li>\n
        26. alert(re.test(str));\/\/true\u00a0\u00a0<\/span><\/li>\n
        27. re=\/^[a-z]\/i;\/\/[]\u5339\u914d\u6307\u5b9a\u8303\u56f4\u5185\u7684\u4efb\u610f\u5b57\u7b26,\u8fd9\u91cc\u5c06\u5339\u914d\u82f1\u6587\u5b57\u6bcd,\u4e0d\u533a\u5206\u5927\u5c0f\u5199\u00a0\u00a0<\/span><\/li>\n
        28. str=“variableName”<\/span>;\/\/\u53d8\u91cf\u540d\u5fc5\u987b\u4ee5\u5b57\u6bcd\u5f00\u5934\u00a0\u00a0<\/span><\/li>\n
        29. alert(re.test(str));\/\/true\u00a0\u00a0<\/span><\/li>\n
        30. str=“123abc”<\/span>;<\/li>\n
        31. alert(re.test(str));\/\/false\u00a0\u00a0<\/span><\/li>\n<\/ol>\n<\/div>\n<\/div>\n

          \u5f53\u7136,\u4ec5\u4ec5\u77e5\u9053\u4e86\u5b57\u7b26\u4e32\u662f\u5426\u5339\u914d\u6a21\u5f0f\u8fd8\u4e0d\u591f,\u6211\u4eec\u8fd8\u9700\u8981\u77e5\u9053\u54ea\u4e9b\u5b57\u7b26\u5339\u914d\u4e86\u6a21\u5f0f<\/p>\n

          \n
          JavaScript Code<\/span>\u590d\u5236\u5185\u5bb9\u5230\u526a\u8d34\u677f<\/span><\/div>\n
          \n
            \n
          1. var<\/span>\u00a0osVersion\u00a0=\u00a0“Ubuntu\u00a08”<\/span>;\/\/\u5176\u4e2d\u76848\u8868\u793a\u7cfb\u7edf\u4e3b\u7248\u672c\u53f7\u00a0\u00a0<\/span><\/li>\n
          2. var<\/span>\u00a0re\u00a0=\u00a0\/^[a-z]+\\s+\\d+$\/i;\u00a0\/\/+\u53f7\u8868\u793a\u5b57\u7b26\u81f3\u5c11\u8981\u51fa\u73b01\u6b21,\\s\u8868\u793a\u7a7a\u767d\u5b57\u7b26,\\d\u8868\u793a\u4e00\u4e2a\u6570\u5b57\u00a0\u00a0<\/span><\/li>\n
          3. alert(re.test(osVersion));\/\/true,\u4f46\u6211\u4eec\u60f3\u77e5\u9053\u4e3b\u7248\u672c\u53f7\u00a0\u00a0<\/span><\/li>\n
          4. \/\/\u53e6\u4e00\u4e2a\u65b9\u6cd5exec,\u8fd4\u56de\u4e00\u4e2a\u6570\u7ec4,\u6570\u7ec4\u7684\u7b2c\u4e00\u4e2a\u5143\u7d20\u4e3a\u5b8c\u6574\u7684\u5339\u914d\u5185\u5bb9\u00a0\u00a0<\/span><\/li>\n
          5. re=\/^[a-z]+\\s+\\d+$\/i;<\/li>\n
          6. arr\u00a0=\u00a0re.exec(osVersion);<\/li>\n
          7. alert(arr[0]);\/\/\u5c06osVersion\u5b8c\u6574\u8f93\u51fa,\u56e0\u4e3a\u6574\u4e2a\u5b57\u7b26\u4e32\u521a\u597d\u5339\u914dre\u00a0\u00a0<\/span><\/li>\n
          8. \/\/\u6211\u53ea\u9700\u8981\u53d6\u51fa\u6570\u5b57\u00a0\u00a0<\/span><\/li>\n
          9. re=\/\\d+\/;<\/li>\n
          10. var<\/span>\u00a0arr\u00a0=\u00a0re.exec(osVersion);<\/li>\n
          11. alert(arr[0]);\/\/8\u00a0\u00a0<\/span><\/li>\n<\/ol>\n<\/div>\n<\/div>\n

            \u66f4\u590d\u6742\u7684\u7528\u6cd5,\u4f7f\u7528\u5b50\u5339\u914d<\/p>\n

            \n
            JavaScript Code<\/span>\u590d\u5236\u5185\u5bb9\u5230\u526a\u8d34\u677f<\/span><\/div>\n
            \n
              \n
            1. \/\/exec\u8fd4\u56de\u7684\u6570\u7ec4\u7b2c1\u5230n\u5143\u7d20\u4e2d\u5305\u542b\u7684\u662f\u5339\u914d\u4e2d\u51fa\u73b0\u7684\u4efb\u610f\u4e00\u4e2a\u5b50\u5339\u914d\u00a0\u00a0<\/span><\/li>\n
            2. re=\/^[a-z]+\\s+(\\d+)$\/i;\/\/\u7528()\u6765\u521b\u5efa\u5b50\u5339\u914d\u00a0\u00a0<\/span><\/li>\n
            3. arr\u00a0=re.exec(osVersion);<\/li>\n
            4. alert(arr[0]);\/\/\u6574\u4e2aosVersion,\u4e5f\u5c31\u662f\u6b63\u5219\u8868\u8fbe\u5f0f\u7684\u5b8c\u6574\u5339\u914d\u00a0\u00a0<\/span><\/li>\n
            5. alert(arr[1]);\/\/8,\u7b2c\u4e00\u4e2a\u5b50\u5339\u914d,\u4e8b\u5b9e\u4e5f\u53ef\u4ee5\u8fd9\u6837\u53d6\u51fa\u4e3b\u7248\u672c\u53f7\u00a0\u00a0<\/span><\/li>\n
            6. alert(arr.length);\/\/2\u00a0\u00a0<\/span><\/li>\n
            7. osVersion\u00a0=\u00a0“Ubuntu\u00a08.10”<\/span>;\/\/\u53d6\u51fa\u4e3b\u7248\u672c\u53f7\u548c\u6b21\u7248\u672c\u53f7\u00a0\u00a0<\/span><\/li>\n
            8. re\u00a0=\u00a0\/^[a-z]+\\s+(\\d+)\\.(\\d+)$\/i;\/\/.\u662f\u6b63\u5219\u8868\u8fbe\u5f0f\u5143\u5b57\u7b26\u4e4b\u4e00,\u82e5\u8981\u7528\u5b83\u7684\u5b57\u9762\u610f\u4e49\u987b\u8f6c\u4e49\u00a0\u00a0<\/span><\/li>\n
            9. arr\u00a0=\u00a0re.exec(osVersion);<\/li>\n
            10. alert(arr[0]);\/\/\u5b8c\u6574\u7684osVersion\u00a0\u00a0<\/span><\/li>\n
            11. alert(arr[1]);\/\/8\u00a0\u00a0<\/span><\/li>\n
            12. alert(arr[2]);\/\/10\u00a0\u00a0<\/span><\/li>\n<\/ol>\n<\/div>\n<\/div>\n

              \u6ce8\u610f,\u5f53\u5b57\u7b26\u4e32\u4e0d\u5339\u914dre\u65f6,exec\u65b9\u6cd5\u5c06\u8fd4\u56denull<\/p>\n

              String\u5bf9\u8c61\u7684\u4e00\u4e9b\u548c\u6b63\u5219\u8868\u8fbe\u5f0f\u6709\u5173\u7684\u65b9\u6cd5<\/p>\n

              \n
              JavaScript Code<\/span>\u590d\u5236\u5185\u5bb9\u5230\u526a\u8d34\u677f<\/span><\/div>\n
              \n
                \n
              1. \/\/replace\u65b9\u6cd5,\u7528\u4e8e\u66ff\u6362\u5b57\u7b26\u4e32\u00a0\u00a0<\/span><\/li>\n
              2. var<\/span>\u00a0str\u00a0=“some\u00a0money”<\/span>;<\/li>\n
              3. alert(str.replace(“some”<\/span>,“much”<\/span>));\/\/much\u00a0money\u00a0\u00a0<\/span><\/li>\n
              4. \/\/replace\u7684\u7b2c\u4e00\u4e2a\u53c2\u6570\u53ef\u4ee5\u4e3a\u6b63\u5219\u8868\u8fbe\u5f0f\u00a0\u00a0<\/span><\/li>\n
              5. var<\/span>\u00a0re\u00a0=\u00a0\/\\s\/;\/\/\u7a7a\u767d\u5b57\u7b26\u00a0\u00a0<\/span><\/li>\n
              6. alert(str.replace(re,“%”<\/span>));\/\/some%money\u00a0\u00a0<\/span><\/li>\n
              7. \/\/\u5728\u4e0d\u77e5\u9053\u5b57\u7b26\u4e32\u4e2d\u6709\u591a\u5c11\u7a7a\u767d\u5b57\u7b26\u65f6,\u6b63\u5219\u8868\u8fbe\u5f0f\u6781\u4e3a\u65b9\u4fbf\u00a0\u00a0<\/span><\/li>\n
              8. str\u00a0=“some\u00a0some\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\\tsome\\t\\f”<\/span>;<\/li>\n
              9. re\u00a0=\u00a0\/\\s+\/;<\/li>\n
              10. alert(str.replace(re,“#”<\/span>));\/\/\u4f46\u8fd9\u6837\u53ea\u4f1a\u5c06\u7b2c\u4e00\u6b21\u51fa\u73b0\u7684\u4e00\u5806\u7a7a\u767d\u5b57\u7b26\u66ff\u6362\u6389\u00a0\u00a0<\/span><\/li>\n
              11. \/\/\u56e0\u4e3a\u4e00\u4e2a\u6b63\u5219\u8868\u8fbe\u5f0f\u53ea\u80fd\u8fdb\u884c\u4e00\u6b21\u5339\u914d,\\s+\u5339\u914d\u4e86\u7b2c\u4e00\u4e2a\u7a7a\u683c\u540e\u5c31\u9000\u51fa\u4e86\u00a0\u00a0<\/span><\/li>\n
              12. re\u00a0=\u00a0\/\\s+\/g;\/\/g,\u5168\u5c40\u6807\u5fd7,\u5c06\u4f7f\u6b63\u5219\u8868\u8fbe\u5f0f\u5339\u914d\u6574\u4e2a\u5b57\u7b26\u4e32\u00a0\u00a0<\/span><\/li>\n
              13. alert(str.replace(re,“@”<\/span>));\/\/some@some@some@\u00a0\u00a0<\/span><\/li>\n
              14. \/\/\u53e6\u4e00\u4e2a\u4e0e\u4e4b\u76f8\u4f3c\u7684\u662fsplit\u00a0\u00a0<\/span><\/li>\n
              15. var<\/span>\u00a0str\u00a0=\u00a0“a-bd-c”<\/span>;<\/li>\n
              16. var<\/span>\u00a0arr\u00a0=\u00a0str.split(“-“<\/span>);\/\/\u8fd4\u56de[“a”,”bd”,”c”]\u00a0\u00a0<\/span><\/li>\n
              17. \/\/\u5982\u679cstr\u662f\u7528\u6237\u8f93\u5165\u7684,\u4ed6\u53ef\u80fd\u8f93\u5165a-bd-c\u4e5f\u53ef\u80fd\u8f93\u5165a\u00a0bd\u00a0c\u6216a_bd_c,\u4f46\u4e0d\u4f1a\u662fabdc(\u8fd9\u6837\u5c31\u8bf4\u4ed6\u8f93\u9519\u4e86)\u00a0\u00a0<\/span><\/li>\n
              18. str\u00a0=\u00a0“a_db-c”<\/span>;\/\/\u7528\u6237\u4ee5\u4ed6\u559c\u6b22\u7684\u65b9\u5f0f\u52a0\u5206\u9694\u7b26s\u00a0\u00a0<\/span><\/li>\n
              19. re=\/[^a-z]\/i;\/\/\u524d\u9762\u6211\u4eec\u8bf4^\u8868\u793a\u5b57\u7b26\u5f00\u59cb,\u4f46\u5728[]\u91cc\u5b83\u8868\u793a\u4e00\u4e2a\u8d1f\u5b57\u7b26\u96c6\u00a0\u00a0<\/span><\/li>\n
              20. \/\/\u5339\u914d\u4efb\u4f55\u4e0d\u5728\u6307\u5b9a\u8303\u56f4\u5185\u7684\u4efb\u610f\u5b57\u7b26,\u8fd9\u91cc\u5c06\u5339\u914d\u9664\u5b57\u6bcd\u5904\u7684\u6240\u6709\u5b57\u7b26\u00a0\u00a0<\/span><\/li>\n
              21. arr\u00a0=\u00a0str.split(re);\/\/\u4ecd\u8fd4\u56de[“a”,”bd”,”c”];\u00a0\u00a0<\/span><\/li>\n
              22. \/\/\u5728\u5b57\u7b26\u4e32\u4e2d\u67e5\u627e\u65f6\u6211\u4eec\u5e38\u7528indexOf,\u4e0e\u4e4b\u5bf9\u5e94\u7528\u4e8e\u6b63\u5219\u67e5\u627e\u7684\u65b9\u6cd5\u662fsearch\u00a0\u00a0<\/span><\/li>\n
              23. str\u00a0=\u00a0“My\u00a0age\u00a0is\u00a018.Golden\u00a0age!”<\/span>;\/\/\u5e74\u9f84\u4e0d\u662f\u4e00\u5b9a\u7684,\u6211\u4eec\u7528indexOf\u4e0d\u80fd\u67e5\u627e\u5b83\u7684\u4f4d\u7f6e\u00a0\u00a0<\/span><\/li>\n
              24. re\u00a0=\u00a0\/\\d+\/;<\/li>\n
              25. alert(str.search(re));\/\/\u8fd4\u56de\u67e5\u627e\u5230\u7684\u5b57\u7b26\u4e32\u5f00\u59cb\u4e0b\u680710\u00a0\u00a0<\/span><\/li>\n
              26. \/\/\u6ce8\u610f,\u56e0\u4e3a\u67e5\u627e\u672c\u8eab\u5c31\u662f\u51fa\u73b0\u7b2c\u4e00\u6b21\u5c31\u7acb\u5373\u8fd4\u56de,\u6240\u4ee5\u65e0\u9700\u5728search\u65f6\u4f7f\u7528g\u6807\u5fd7\u00a0\u00a0<\/span><\/li>\n
              27. \/\/\u4e0b\u9762\u7684\u4ee3\u7801\u867d\u7136\u4e0d\u51fa\u9519,\u4f46g\u6807\u5fd7\u662f\u591a\u4f59\u7684\u00a0\u00a0<\/span><\/li>\n
              28. re=\/\\d+\/g;<\/li>\n
              29. alert(str.search(re));\/\/\u4ecd\u7136\u662f10\u00a0\u00a0<\/span><\/li>\n<\/ol>\n<\/div>\n<\/div>\n

                \u6ce8\u610f,\u5f53search\u65b9\u6cd5\u6ca1\u6709\u627e\u5230\u5339\u914d\u65f6,\u5c06\u8fd4\u56de-1<\/p>\n

                \u7c7b\u4f3c\u4e8eexec\u65b9\u6cd5,String\u5bf9\u8c61\u7684match\u65b9\u6cd5\u4e5f\u7528\u4e8e\u5c06\u5b57\u7b26\u4e32\u4e0e\u6b63\u5219\u8868\u8fbe\u5f0f\u8fdb\u884c\u5339\u914d\u5e76\u8fd4\u56de\u7ed3\u679c\u6570\u7ec4<\/p>\n

                \n
                JavaScript Code<\/span>\u590d\u5236\u5185\u5bb9\u5230\u526a\u8d34\u677f<\/span><\/div>\n
                \n
                  \n
                1. var<\/span>\u00a0str\u00a0=\u00a0“My\u00a0name\u00a0is\u00a0CJ.Hello\u00a0everyone!”<\/span>;<\/li>\n
                2. var<\/span>\u00a0re\u00a0=\u00a0\/[A-Z]\/;\/\/\u5339\u914d\u6240\u6709\u5927\u5199\u5b57\u6bcd\u00a0\u00a0<\/span><\/li>\n
                3. var<\/span>\u00a0arr\u00a0=\u00a0str.match(re);\/\/\u8fd4\u56de\u6570\u7ec4\u00a0\u00a0<\/span><\/li>\n
                4. alert(arr);\/\/\u6570\u7ec4\u4e2d\u53ea\u4f1a\u5305\u542b\u4e00\u4e2aM,\u56e0\u4e3a\u6211\u4eec\u6ca1\u6709\u4f7f\u7528\u5168\u5c40\u5339\u914d\u00a0\u00a0<\/span><\/li>\n
                5. re\u00a0=\u00a0\/[A-Z]\/g;<\/li>\n
                6. arr\u00a0=\u00a0str.match(re);<\/li>\n
                7. alert(arr);\/\/M,C,J,H\u00a0\u00a0<\/span><\/li>\n
                8. \/\/\u4ece\u5b57\u7b26\u4e32\u4e2d\u62bd\u53d6\u5355\u8bcd\u00a0\u00a0<\/span><\/li>\n
                9. re\u00a0=\u00a0\/\\b[a-z]*\\b\/gi;\/\/\\b\u8868\u793a\u5355\u8bcd\u8fb9\u754c\u00a0\u00a0<\/span><\/li>\n
                10. str\u00a0=\u00a0“one\u00a0two\u00a0three\u00a0four”<\/span>;<\/li>\n
                11. alert(str.match(re));\/\/one,two,three,four\u00a0\u00a0<\/span><\/li>\n<\/ol>\n<\/div>\n<\/div>\n

                  RegExp\u5bf9\u8c61\u5b9e\u4f8b\u7684\u4e00\u4e9b\u5c5e\u6027<\/p>\n

                  \n
                  JavaScript Code<\/span>\u590d\u5236\u5185\u5bb9\u5230\u526a\u8d34\u677f<\/span><\/div>\n
                  \n
                    \n
                  1. var<\/span>\u00a0re\u00a0=\u00a0\/[a-z]\/i;<\/li>\n
                  2. alert(re.source);\/\/\u5c06[a-z]\u5b57\u7b26\u4e32\u8f93\u51fa\u00a0\u00a0<\/span><\/li>\n
                  3. \/\/\u8bf7\u6ce8\u610f,\u76f4\u63a5alert(re)\u4f1a\u5c06\u6b63\u5219\u8868\u8fbe\u5f0f\u8fde\u540c\u524d\u5411\u659c\u7ebf\u4e0e\u6807\u5fd7\u8f93\u51fa,\u8fd9\u662fre.toString\u65b9\u6cd5\u5b9a\u4e49\u7684\u00a0\u00a0<\/span><\/li>\n<\/ol>\n<\/div>\n<\/div>\n

                    \u6bcf\u4e2aRegExp\u5bf9\u8c61\u7684\u5b9e\u4f8b\u5177\u6709lastIndex\u5c5e\u6027,\u5b83\u662f\u88ab\u67e5\u627e\u5b57\u7b26\u4e32\u4e2d\u4e0b\u4e00\u6b21\u6210\u529f\u5339\u914d\u7684\u5f00\u59cb\u4f4d\u7f6e,\u9ed8\u8ba4\u503c\u662f-1\u3002 lastIndex \u5c5e\u6027\u88ab RegExp \u5bf9\u8c61\u7684 exec \u548c test \u65b9\u6cd5\u4fee\u6539.\u5e76\u4e14\u5b83\u662f\u53ef\u5199\u7684.<\/p>\n

                    \n
                    JavaScript Code<\/span>\u590d\u5236\u5185\u5bb9\u5230\u526a\u8d34\u677f<\/span><\/div>\n
                    \n
                      \n
                    1. var<\/span>\u00a0re\u00a0=\u00a0\/[A-Z]\/;<\/li>\n
                    2. \/\/exec\u65b9\u6cd5\u6267\u884c\u540e,\u4fee\u6539\u4e86re\u7684lastIndex\u5c5e\u6027,\u00a0\u00a0<\/span><\/li>\n
                    3. var<\/span>\u00a0str\u00a0=\u00a0“Hello,World!!!”<\/span>;<\/li>\n
                    4. var<\/span>\u00a0arr\u00a0=\u00a0re.exec(str);<\/li>\n
                    5. alert(re.lastIndex);\/\/0,\u56e0\u4e3a\u6ca1\u6709\u8bbe\u7f6e\u5168\u5c40\u6807\u5fd7\u00a0\u00a0<\/span><\/li>\n
                    6. re\u00a0=\u00a0\/[A-Z]\/g;<\/li>\n
                    7. arr\u00a0=\u00a0re.exec(str);<\/li>\n
                    8. alert(re.lastIndex);\/\/1\u00a0\u00a0<\/span><\/li>\n
                    9. arr\u00a0=\u00a0re.exec(str);<\/li>\n
                    10. alert(re.lastIndex);\/\/7\u00a0\u00a0<\/span><\/li>\n<\/ol>\n<\/div>\n<\/div>\n

                      \u5f53\u5339\u914d\u5931\u8d25\uff08\u540e\u9762\u6ca1\u6709\u5339\u914d\uff09\uff0c\u6216lastIndex\u503c\u5927\u4e8e\u5b57\u7b26\u4e32\u957f\u5ea6\u65f6\uff0c\u518d\u6267\u884cexec\u7b49\u65b9\u6cd5\u4f1a\u5c06lastIndex\u8bbe\u4e3a0(\u5f00\u59cb\u4f4d\u7f6e)<\/p>\n

                      \n
                      JavaScript Code<\/span>\u590d\u5236\u5185\u5bb9\u5230\u526a\u8d34\u677f<\/span><\/div>\n
                      \n
                        \n
                      1. var<\/span>\u00a0re\u00a0=\u00a0\/[A-Z]\/;<\/li>\n
                      2. var<\/span>\u00a0str\u00a0=\u00a0“Hello,World!!!”<\/span>;<\/li>\n
                      3. re.lastIndex\u00a0=\u00a0120;<\/li>\n
                      4. var<\/span>\u00a0arr\u00a0=\u00a0re.exec(str);<\/li>\n
                      5. alert(re.lastIndex);\/\/0\u00a0\u00a0<\/span><\/li>\n<\/ol>\n<\/div>\n<\/div>\n

                        RegExp\u5bf9\u8c61\u7684\u9759\u6001\u5c5e\u6027<\/p>\n

                        \n
                        JavaScript Code<\/span>\u590d\u5236\u5185\u5bb9\u5230\u526a\u8d34\u677f<\/span><\/div>\n
                        \n
                          \n
                        1. \/\/input\u00a0\u6700\u540e\u7528\u4e8e\u5339\u914d\u7684\u5b57\u7b26\u4e32\uff08\u4f20\u9012\u7ed9test,exec\u65b9\u6cd5\u7684\u5b57\u7b26\u4e32\uff09\u00a0\u00a0<\/span><\/li>\n
                        2. var<\/span>\u00a0re\u00a0=\u00a0\/[A-Z]\/;<\/li>\n
                        3. var<\/span>\u00a0str\u00a0=\u00a0“Hello,World!!!”<\/span>;<\/li>\n
                        4. var<\/span>\u00a0arr\u00a0=\u00a0re.exec(str);<\/li>\n
                        5. alert(RegExp.input);\/\/Hello,World!!!\u00a0\u00a0<\/span><\/li>\n
                        6. re.exec(“tempstr”<\/span>);<\/li>\n
                        7. alert(RegExp.input);\/\/\u4ecd\u7136\u662fHello,World!!!,\u56e0\u4e3atempstr\u4e0d\u5339\u914d\u00a0\u00a0<\/span><\/li>\n
                        8. \/\/lastMatch\u00a0\u6700\u540e\u5339\u914d\u7684\u5b57\u7b26\u00a0\u00a0<\/span><\/li>\n
                        9. re\u00a0=\u00a0\/[a-z]\/g;<\/li>\n
                        10. str\u00a0=\u00a0“hi”<\/span>;<\/li>\n
                        11. re.test(str);<\/li>\n
                        12. alert(RegExp.lastMatch);\/\/h\u00a0\u00a0<\/span><\/li>\n
                        13. re.test(str);<\/li>\n
                        14. alert(RegExp[“$&”<\/span>]);\/\/i\u00a0\u00a0,$&\u662flastMatch\u7684\u77ed\u540d\u5b57\uff0c\u4f46\u7531\u4e8e\u5b83\u4e0d\u662f\u5408\u6cd5\u53d8\u91cf\u540d\uff0c\u6240\u4ee5\u8981\u3002\u3002\u00a0\u00a0<\/span><\/li>\n
                        15. \/\/lastParen\u00a0\u6700\u540e\u5339\u914d\u7684\u5206\u7ec4\u00a0\u00a0<\/span><\/li>\n
                        16. re\u00a0=\u00a0\/[a-z](\\d+)\/gi;<\/li>\n
                        17. str\u00a0=\u00a0“Class1\u00a0Class2\u00a0Class3”<\/span>;<\/li>\n
                        18. re.test(str);<\/li>\n
                        19. alert(RegExp.lastParen);\/\/1\u00a0\u00a0<\/span><\/li>\n
                        20. re.test(str);<\/li>\n
                        21. alert(RegExp[“$+”<\/span>]);\/\/2\u00a0\u00a0<\/span><\/li>\n
                        22. \/\/leftContext\u00a0\u00a0\u8fd4\u56de\u88ab\u67e5\u627e\u7684\u5b57\u7b26\u4e32\u4e2d\u4ece\u5b57\u7b26\u4e32\u5f00\u59cb\u4f4d\u7f6e\u5230\u6700\u540e\u5339\u914d\u4e4b\u524d\u7684\u4f4d\u7f6e\u4e4b\u95f4\u7684\u5b57\u7b26\u00a0\u00a0<\/span><\/li>\n
                        23. \/\/rigthContext\u00a0\u8fd4\u56de\u88ab\u641c\u7d22\u7684\u5b57\u7b26\u4e32\u4e2d\u4ece\u6700\u540e\u4e00\u4e2a\u5339\u914d\u4f4d\u7f6e\u5f00\u59cb\u5230\u5b57\u7b26\u4e32\u7ed3\u5c3e\u4e4b\u95f4\u7684\u5b57\u7b26\u00a0\u00a0<\/span><\/li>\n
                        24. re\u00a0=\u00a0\/[A-Z]\/g;<\/li>\n
                        25. str\u00a0=\u00a0“123ABC456”<\/span>;<\/li>\n
                        26. re.test(str);<\/li>\n
                        27. alert(RegExp.leftContext);\/\/123\u00a0\u00a0<\/span><\/li>\n
                        28. alert(RegExp.rightContext);\/\/BC456\u00a0\u00a0<\/span><\/li>\n
                        29. re.test(str);<\/li>\n
                        30. alert(RegExp[“$`”<\/span>]);\/\/123A\u00a0\u00a0<\/span><\/li>\n
                        31. alert(RegExp[“$'”<\/span>]);\/\/C456\u00a0\u00a0<\/span><\/li>\n<\/ol>\n<\/div>\n<\/div>\n

                          multiline\u5c5e\u6027\u8fd4\u56de\u6b63\u5219\u8868\u8fbe\u5f0f\u662f\u5426\u4f7f\u7528\u591a\u884c\u6a21\u5f0f,\u8fd9\u4e2a\u5c5e\u6027\u4e0d\u9488\u5bf9\u67d0\u4e2a\u6b63\u5219\u8868\u8fbe\u5f0f\u5b9e\u4f8b\uff0c\u800c\u662f\u9488\u5bf9\u6240\u6709\u6b63\u5219\u8868\u8fbe\u5f0f\uff0c\u5e76\u4e14\u8fd9\u4e2a\u5c5e\u6027\u53ef\u5199.(IE\u4e0eOpera\u4e0d\u652f\u6301\u8fd9\u4e2a\u5c5e\u6027)<\/p>\n

                          \n
                          JavaScript Code<\/span>\u590d\u5236\u5185\u5bb9\u5230\u526a\u8d34\u677f<\/span><\/div>\n
                          \n
                            \n
                          1. alert(RegExp.multiline);<\/li>\n
                          2. \/\/\u56e0\u4e3aIE\uff0cOpera\u4e0d\u652f\u6301\u8fd9\u4e2a\u5c5e\u6027\uff0c\u6240\u4ee5\u6700\u597d\u8fd8\u662f\u5355\u72ec\u6307\u5b9a\u00a0\u00a0<\/span><\/li>\n
                          3. var<\/span>\u00a0re\u00a0=\u00a0\/\\w+\/m;<\/li>\n
                          4. alert(re.multiline);<\/li>\n
                          5. alert(RegExp[“$*”<\/span>]);\/\/RegExp\u5bf9\u8c61\u7684\u9759\u6001\u5c5e\u6027\u4e0d\u4f1a\u56e0\u4e3a\u7ed9RegExp\u67d0\u4e2a\u5bf9\u8c61\u5b9e\u4f8b\u6307\u5b9a\u4e86m\u6807\u5fd7\u800c\u6539\u53d8\u00a0\u00a0<\/span><\/li>\n
                          6. RegExp.multiline\u00a0=\u00a0true<\/span>;\/\/\u8fd9\u5c06\u6253\u5f00\u6240\u6709\u6b63\u5219\u8868\u8fbe\u5f0f\u5b9e\u4f8b\u7684\u591a\u884c\u5339\u914d\u6a21\u5f0f\u00a0\u00a0<\/span><\/li>\n
                          7. alert(RegExp.multiline);<\/li>\n<\/ol>\n<\/div>\n<\/div>\n

                            \u4f7f\u7528\u5143\u5b57\u7b26\u6ce8\u610f\u4e8b\u9879:\u5143\u5b57\u7b26\u662f\u6b63\u5219\u8868\u8fbe\u5f0f\u7684\u4e00\u90e8\u5206\uff0c\u5f53\u6211\u4eec\u8981\u5339\u914d\u6b63\u5219\u8868\u8fbe\u5f0f\u672c\u8eab\u65f6\uff0c\u5fc5\u987b\u5bf9\u8fd9\u4e9b\u5143\u5b57\u7b26\u8f6c\u4e49.\u4e0b\u9762\u662f\u6b63\u5219\u8868\u8fbe\u5f0f\u7528\u5230\u7684\u6240\u6709\u5143\u5b57\u7b26
                            \n( [ { \\ ^ $ | ) ? * + .<\/p>\n

                            \n
                            JavaScript Code<\/span>\u590d\u5236\u5185\u5bb9\u5230\u526a\u8d34\u677f<\/span><\/div>\n
                            \n
                              \n
                            1. var<\/span>\u00a0str\u00a0=\u00a0“?”<\/span>;<\/li>\n
                            2. \u00a0\u00a0\u00a0\u00a0var<\/span>\u00a0re\u00a0=\u00a0\/?\/;<\/li>\n
                            3. \u00a0\u00a0\u00a0\u00a0alert(re.test(str));\/\/\u51fa\u9519\uff0c\u56e0\u4e3a\uff1f\u662f\u5143\u5b57\u7b26\uff0c\u5fc5\u987b\u8f6c\u4e49\u00a0\u00a0<\/span><\/li>\n
                            4. \u00a0\u00a0\u00a0\u00a0re\u00a0=\u00a0\/\\?\/;<\/li>\n
                            5. \u00a0\u00a0\u00a0\u00a0alert(re.test(str));\/\/true\u00a0\u00a0<\/span><\/li>\n<\/ol>\n<\/div>\n<\/div>\n

                              \u4f7f\u7528RegExp\u6784\u9020\u51fd\u6570\u4e0e\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u5b57\u9762\u91cf\u521b\u5efa\u6b63\u5219\u8868\u8fbe\u5f0f\u6ce8\u610f\u70b9<\/p>\n

                              \n
                              JavaScript Code<\/span>\u590d\u5236\u5185\u5bb9\u5230\u526a\u8d34\u677f<\/span><\/div>\n
                              \n
                                \n
                              1. var<\/span>\u00a0str\u00a0=\u00a0“\\?”<\/span>;<\/li>\n
                              2. alert(str);\/\/\u53ea\u4f1a\u8f93\u51fa?\u00a0\u00a0<\/span><\/li>\n
                              3. var<\/span>\u00a0re\u00a0=\u00a0\/\\?\/;\/\/\u5c06\u5339\u914d?\u00a0\u00a0<\/span><\/li>\n
                              4. alert(re.test(str));\/\/true\u00a0\u00a0<\/span><\/li>\n
                              5. re\u00a0=\u00a0new<\/span>\u00a0RegExp(“\\?”<\/span>);\/\/\u51fa\u9519,\u56e0\u4e3a\u8fd9\u76f8\u5f53\u4e8ere\u00a0=\u00a0\/\\?\/\u00a0\u00a0<\/span><\/li>\n
                              6. re\u00a0=\u00a0new<\/span>\u00a0RegExp(“\\\\?”<\/span>);\/\/\u6b63\u786e\uff0c\u5c06\u5339\u914d\uff1f\u00a0\u00a0<\/span><\/li>\n
                              7. alert(re.test(str));\/\/true\u00a0\u00a0<\/span><\/li>\n<\/ol>\n<\/div>\n<\/div>\n

                                \u65e2\u7136\u53cc\u91cd\u8f6c\u4e49\u8fd9\u4e48\u4e0d\u53cb\u597d\uff0c\u6240\u4ee5\u8fd8\u662f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u5b57\u9762\u91cf\u7684\u58f0\u660e\u65b9\u5f0f<\/p>\n

                                \u5982\u4f55\u5728\u6b63\u5219\u8868\u8fbe\u5f0f\u4e2d\u4f7f\u7528\u7279\u6b8a\u5b57\u7b26\uff1f<\/p>\n

                                \n
                                JavaScript Code<\/span>\u590d\u5236\u5185\u5bb9\u5230\u526a\u8d34\u677f<\/span><\/div>\n
                                \n
                                  \n
                                1. \/\/ASCII\u65b9\u5f0f\u7528\u5341\u516d\u8fdb\u5236\u6570\u6765\u8868\u793a\u7279\u6b8a\u5b57\u7b26\u00a0\u00a0<\/span><\/li>\n
                                2. var<\/span>\u00a0re\u00a0=\u00a0\/^\\x43\\x4A$\/;\/\/\u5c06\u5339\u914dCJ\u00a0\u00a0<\/span><\/li>\n
                                3. alert(re.test(“CJ”<\/span>));\/\/true\u00a0\u00a0<\/span><\/li>\n
                                4. \/\/\u4e5f\u53ef\u4f7f\u7528\u516b\u8fdb\u5236\u65b9\u5f0f\u00a0\u00a0<\/span><\/li>\n
                                5. re\u00a0=\u00a0\/^\\103\\112$\/;\/\/\u5c06\u5339\u914dCJ\u00a0\u00a0<\/span><\/li>\n
                                6. alert(re.test(“CJ”<\/span>));\/\/true\u00a0\u00a0<\/span><\/li>\n
                                7. \/\/\u8fd8\u53ef\u4ee5\u4f7f\u7528Unicode\u7f16\u7801\u00a0\u00a0<\/span><\/li>\n
                                8. re\u00a0=\/^\\u0043\\u004A$\/;\/\/\u4f7f\u7528\u00a0Unicode\uff0c\u5fc5\u987b\u4f7f\u7528u\u5f00\u5934\uff0c\u63a5\u7740\u662f\u5b57\u7b26\u7f16\u7801\u7684\u56db\u4f4d16\u8fdb\u5236\u8868\u73b0\u5f62\u5f0f\u00a0\u00a0<\/span><\/li>\n
                                9. alert(re.test(“CJ”<\/span>));<\/li>\n<\/ol>\n<\/div>\n<\/div>\n

                                  \u53e6\u5904\uff0c\u8fd8\u6709\u4e00\u4e9b\u5176\u5b83\u7684\u9884\u5b9a\u4e49\u7279\u6b8a\u5b57\u7b26\uff0c\u5982\u4e0b\u8868\u6240\u793a:<\/p>\n

                                  \u5b57\u7b26\u00a0\u00a0\u00a0 \u63cf\u8ff0
                                  \n\\n\u00a0\u00a0\u00a0\u00a0\u00a0 \u6362\u884c\u7b26
                                  \n\\r\u00a0\u00a0\u00a0\u00a0\u00a0 \u56de\u8f66\u7b26
                                  \n\\t\u00a0\u00a0\u00a0\u00a0\u00a0 \u5236\u8868\u7b26
                                  \n\\f\u00a0\u00a0\u00a0\u00a0\u00a0 \u6362\u9875\u7b26\uff08Tab\uff09
                                  \n\\cX\u00a0\u00a0\u00a0\u00a0 \u4e0eX\u5bf9\u5e94\u7684\u63a7\u5236\u5b57\u7b26
                                  \n\\b\u00a0\u00a0\u00a0\u00a0\u00a0 \u9000\u683c\u7b26(BackSpace)
                                  \n\\v\u00a0\u00a0\u00a0\u00a0\u00a0 \u5782\u76f4\u5236\u8868\u7b26
                                  \n\\0\u00a0\u00a0\u00a0\u00a0\u00a0 \u7a7a\u5b57\u7b26(“”)<\/p>\n

                                  \u5b57\u7b26\u7c7b —\u3009\u7b80\u5355\u7c7b\uff0c\u53cd\u5411\u7c7b\uff0c\u8303\u56f4\u7c7b\uff0c\u7ec4\u5408\u7c7b\uff0c\u9884\u5b9a\u4e49\u7c7b<\/p>\n

                                  \n
                                  JavaScript Code<\/span>\u590d\u5236\u5185\u5bb9\u5230\u526a\u8d34\u677f<\/span><\/div>\n
                                  \n
                                    \n
                                  1. \/\/\u7b80\u5355\u7c7b\u00a0\u00a0<\/span><\/li>\n
                                  2. var<\/span>\u00a0re\u00a0=\u00a0\/[abc123]\/;\/\/\u5c06\u5339\u914dabc123\u8fd96\u4e2a\u5b57\u7b26\u4e2d\u4e00\u4e2a\u00a0\u00a0<\/span><\/li>\n
                                  3. \/\/\u8d1f\u5411\u7c7b\u00a0\u00a0<\/span><\/li>\n
                                  4. re\u00a0=\u00a0\/[^abc]\/;\/\/\u5c06\u5339\u914d\u9664abc\u4e4b\u5916\u7684\u4e00\u4e2a\u5b57\u7b26\u00a0\u00a0<\/span><\/li>\n
                                  5. \/\/\u8303\u56f4\u7c7b\u00a0\u00a0<\/span><\/li>\n
                                  6. re\u00a0=\u00a0\/[a-b]\/;\/\/\u5c06\u5339\u914d\u5c0f\u5199a-b\u00a026\u4e2a\u5b57\u6bcd\u00a0\u00a0<\/span><\/li>\n
                                  7. re\u00a0=\u00a0\/[^0-9]\/;\/\/\u5c06\u5339\u914d\u96640-9\u00a010\u4e2a\u5b57\u7b26\u4e4b\u5904\u7684\u4e00\u4e2a\u5b57\u7b26\u00a0\u00a0<\/span><\/li>\n
                                  8. \/\/\u7ec4\u5408\u7c7b\u00a0\u00a0<\/span><\/li>\n
                                  9. re\u00a0=\u00a0\/[a-b0-9A-Z_]\/;\/\/\u5c06\u5339\u914d\u5b57\u6bcd\uff0c\u6570\u5b57\u548c\u4e0b\u5212\u7ebf\u00a0\u00a0<\/span><\/li>\n<\/ol>\n<\/div>\n<\/div>\n

                                    \u4e0b\u9762\u662f\u6b63\u5219\u8868\u8fbe\u5f0f\u4e2d\u7684\u9884\u5b9a\u4e49\u7c7b<\/p>\n

                                    \u4ee3\u7801\u00a0 \u7b49\u540c\u4e8e\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u5339\u914d
                                    \n.\u00a0\u00a0\u00a0\u00a0 IE\u4e0b[^\\n]\uff0c\u5176\u5b83[^\\n\\r]\u00a0 \u5339\u914d\u9664\u6362\u884c\u7b26\u4e4b\u5916\u7684\u4efb\u4f55\u4e00\u4e2a\u5b57\u7b26
                                    \n\\d\u00a0\u00a0\u00a0 [0-9]\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u5339\u914d\u6570\u5b57
                                    \n\\D\u00a0\u00a0\u00a0 [^0-9]\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u5339\u914d\u975e\u6570\u5b57\u5b57\u7b26
                                    \n\\s\u00a0\u00a0\u00a0 [ \\n\\r\\t\\f\\x0B]\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u5339\u914d\u4e00\u4e2a\u7a7a\u767d\u5b57\u7b26
                                    \n\\S\u00a0\u00a0\u00a0 [^ \\n\\r\\t\\f\\x0B]\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u5339\u914d\u4e00\u4e2a\u975e\u7a7a\u767d\u5b57\u7b26
                                    \n\\w\u00a0\u00a0\u00a0 [a-zA-Z0-9_]\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u5339\u914d\u5b57\u6bcd\u6570\u5b57\u548c\u4e0b\u5212\u7ebf
                                    \n\\W\u00a0\u00a0\u00a0 [^a-zA-Z0-9_]\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u5339\u914d\u9664\u5b57\u6bcd\u6570\u5b57\u4e0b\u5212\u7ebf\u4e4b\u5916\u7684\u5b57\u7b26<\/p>\n

                                    \u91cf\u8bcd(\u4e0b\u8868\u91cf\u8bcd\u5355\u4e2a\u51fa\u73b0\u65f6\u7686\u662f\u8d2a\u5a6a\u91cf\u8bcd)<\/p>\n

                                    \u4ee3\u7801\u00a0 \u63cf\u8ff0
                                    \n*\u00a0\u00a0\u00a0\u00a0 \u5339\u914d\u524d\u9762\u7684\u5b50\u8868\u8fbe\u5f0f\u96f6\u6b21\u6216\u591a\u6b21\u3002\u4f8b\u5982\uff0czo* \u80fd\u5339\u914d “z” \u4ee5\u53ca “zoo”\u3002 * \u7b49\u4ef7\u4e8e{0,}\u3002
                                    \n+\u00a0\u00a0\u00a0\u00a0 \u5339\u914d\u524d\u9762\u7684\u5b50\u8868\u8fbe\u5f0f\u4e00\u6b21\u6216\u591a\u6b21\u3002\u4f8b\u5982\uff0c’zo+’ \u80fd\u5339\u914d “zo” \u4ee5\u53ca “zoo”\uff0c\u4f46\u4e0d\u80fd\u5339\u914d “z”\u3002+ \u7b49\u4ef7\u4e8e {1,}\u3002
                                    \n?\u00a0\u00a0\u00a0\u00a0 \u5339\u914d\u524d\u9762\u7684\u5b50\u8868\u8fbe\u5f0f\u96f6\u6b21\u6216\u4e00\u6b21\u3002\u4f8b\u5982\uff0c”do(es)?” \u53ef\u4ee5\u5339\u914d “do” \u6216 “does” \u4e2d\u7684”do” \u3002? \u7b49\u4ef7\u4e8e {0,1}\u3002
                                    \n{n}\u00a0\u00a0 n \u662f\u4e00\u4e2a\u975e\u8d1f\u6574\u6570\u3002\u5339\u914d\u786e\u5b9a\u7684 n \u6b21\u3002\u4f8b\u5982\uff0c’o{2}’ \u4e0d\u80fd\u5339\u914d “Bob” \u4e2d\u7684 ‘o’\uff0c\u4f46\u662f\u80fd\u5339\u914d “food” \u4e2d\u7684\u4e24\u4e2a o\u3002
                                    \n{n,}\u00a0 n \u662f\u4e00\u4e2a\u975e\u8d1f\u6574\u6570\u3002\u81f3\u5c11\u5339\u914dn \u6b21\u3002\u4f8b\u5982\uff0c’o{2,}’ \u4e0d\u80fd\u5339\u914d “Bob” \u4e2d\u7684 ‘o’\uff0c\u4f46\u80fd\u5339\u914d “foooood” \u4e2d\u7684\u6240\u6709 o\u3002’o{1,}’ \u7b49\u4ef7\u4e8e ‘o+’\u3002’o{0,}’ \u5219\u7b49\u4ef7\u4e8e ‘o*’\u3002
                                    \n{n,m} m \u548c n \u5747\u4e3a\u975e\u8d1f\u6574\u6570\uff0c\u5176\u4e2dn <= m\u3002\u6700\u5c11\u5339\u914d n \u6b21\u4e14\u6700\u591a\u5339\u914d m \u6b21\u3002\u5218\uff0c “o{1,3}” \u5c06\u5339\u914d “fooooood” \u4e2d\u7684\u524d\u4e09\u4e2a o\u3002’o{0,1}’ \u7b49\u4ef7\u4e8e ‘o?’\u3002\u8bf7\u6ce8\u610f\u5728\u9017\u53f7\u548c\u4e24\u4e2a\u6570\u4e4b\u95f4\u4e0d\u80fd\u6709\u7a7a\u683c\u3002<\/p>\n

                                    \u8d2a\u5a6a\u91cf\u8bcd\u4e0e\u60f0\u6027\u91cf\u8bcd<\/p>\n

                                    \u2022\u7528\u8d2a\u5a6a\u91cf\u8bcd\u8fdb\u884c\u5339\u914d\u65f6\uff0c\u5b83\u9996\u5148\u4f1a\u5c06\u6574\u4f1a\u5b57\u7b26\u4e32\u5f53\u6210\u4e00\u4e2a\u5339\u914d\uff0c\u5982\u679c\u5339\u914d\u7684\u8bdd\u5c31\u9000\u51fa\uff0c\u5982\u679c\u4e0d\u5339\u914d\uff0c\u5c31\u622a\u53bb\u6700\u540e\u4e00\u4e2a\u5b57\u7b26\u8fdb\u884c\u5339\u914d\uff0c\u5982\u679c\u4e0d\u5339\u914d\uff0c\u7ee7\u7eed\u5c06\u6700\u540e\u4e00\u4e2a\u5b57\u7b26\u622a\u53bb\u8fdb\u884c\u5339\u914d\uff0c\u76f4\u5230\u6709\u5339\u914d\u4e3a\u6b62\u3002\u76f4\u5230\u73b0\u5728\u6211\u4eec\u9047\u5230\u7684\u91cf\u8bcd\u90fd\u662f\u8d2a\u5a6a\u91cf\u8bcd
                                    \n\u2022\u7528\u60f0\u6027\u91cf\u8bcd\u8fdb\u884c\u5339\u914d\u65f6\uff0c\u5b83\u9996\u5148\u5c06\u7b2c\u4e00\u4e2a\u5b57\u7b26\u5f53\u6210\u4e00\u4e2a\u5339\u914d\uff0c\u5982\u679c\u6210\u529f\u5219\u9000\u51fa\uff0c\u5982\u679c\u5931\u8d25\uff0c\u5219\u6d4b\u8bd5\u524d\u4e24\u4e2a\u5b57\u7b26\uff0c\u4f9d\u4e9b\u589e\u52a0\uff0c\u76f4\u5230\u9047\u5230\u5408\u9002\u7684\u5339\u914d\u4e3a\u6b62<\/p>\n

                                    \u60f0\u6027\u91cf\u8bcd\u4ec5\u4ec5\u5728\u8d2a\u5a6a\u91cf\u8bcd\u540e\u9762\u52a0\u4e2a”?”\u800c\u5df2,\u5982”a+”\u662f\u8d2a\u5a6a\u5339\u914d\u7684,”a+?”\u5219\u662f\u60f0\u6027\u7684<\/p>\n

                                    \n
                                    JavaScript Code<\/span>\u590d\u5236\u5185\u5bb9\u5230\u526a\u8d34\u677f<\/span><\/div>\n
                                    \n
                                      \n
                                    1. var<\/span>\u00a0str\u00a0=\u00a0“abc”<\/span>;<\/li>\n
                                    2. var<\/span>\u00a0re\u00a0=\u00a0\/\\w+\/;\/\/\u5c06\u5339\u914dabc\u00a0\u00a0<\/span><\/li>\n
                                    3. re\u00a0=\u00a0\/\\w+?\/;\/\/\u5c06\u5339\u914da\u00a0\u00a0<\/span><\/li>\n<\/ol>\n<\/div>\n<\/div>\n

                                      \u591a\u884c\u6a21\u5f0f<\/p>\n

                                      \n
                                      JavaScript Code<\/span>\u590d\u5236\u5185\u5bb9\u5230\u526a\u8d34\u677f<\/span><\/div>\n
                                      \n
                                        \n
                                      1. var<\/span>\u00a0re\u00a0=\u00a0\/[a-z]$\/;<\/li>\n
                                      2. \u00a0\u00a0\u00a0\u00a0var<\/span>\u00a0str\u00a0=\u00a0“ab\\ncdef”<\/span>;<\/li>\n
                                      3. \u00a0\u00a0\u00a0\u00a0alert(str.replace(re,“#”<\/span>));\/\/ab\\ncde#\u00a0\u00a0<\/span><\/li>\n
                                      4. \u00a0\u00a0\u00a0\u00a0re\u00a0=\/[a-z]$\/m;<\/li>\n
                                      5. \u00a0\u00a0\u00a0\u00a0alert(str.replace(re,“#”<\/span>));\/\/a#\\ncde#\u00a0\u00a0<\/span><\/li>\n<\/ol>\n<\/div>\n<\/div>\n

                                        \u5206\u7ec4\u4e0e\u975e\u6355\u83b7\u6027\u5206\u7ec4<\/p>\n

                                        \n
                                        JavaScript Code<\/span>\u590d\u5236\u5185\u5bb9\u5230\u526a\u8d34\u677f<\/span><\/div>\n
                                        \n
                                          \n
                                        1. re\u00a0=\u00a0\/abc{2}\/;\/\/\u5c06\u5339\u914dabcc\u00a0\u00a0<\/span><\/li>\n
                                        2. re\u00a0=\u00a0\/(abc){2}\/;\/\/\u5c06\u5339\u914dabcabc\u00a0\u00a0<\/span><\/li>\n
                                        3. \/\/\u4e0a\u9762\u7684\u5206\u7ec4\u90fd\u662f\u6355\u83b7\u6027\u5206\u7ec4\u00a0\u00a0<\/span><\/li>\n
                                        4. str\u00a0=\u00a0“abcabc\u00a0###”<\/span>;<\/li>\n
                                        5. arr\u00a0=\u00a0re.exec(str);<\/li>\n
                                        6. alert(arr[1]);\/\/abc\u00a0\u00a0<\/span><\/li>\n
                                        7. \/\/\u975e\u6355\u83b7\u6027\u5206\u7ec4\u00a0(?:)\u00a0\u00a0<\/span><\/li>\n
                                        8. re\u00a0=\u00a0\/(?:abc){2}\/;<\/li>\n
                                        9. arr\u00a0=\u00a0re.exec(str);<\/li>\n
                                        10. alert(arr[1]);\/\/undefined\u00a0\u00a0<\/span><\/li>\n<\/ol>\n<\/div>\n<\/div>\n

                                          \u5019\u9009\uff08\u4e5f\u5c31\u662f\u6240\u8bf4\u7684\u201c\u6216\u201d\uff09<\/p>\n

                                          \n
                                          JavaScript Code<\/span>\u590d\u5236\u5185\u5bb9\u5230\u526a\u8d34\u677f<\/span><\/div>\n
                                          \n
                                            \n
                                          1. re\u00a0=\u00a0\/^a|bc$\/;\/\/\u5c06\u5339\u914d\u5f00\u59cb\u4f4d\u7f6e\u7684a\u6216\u7ed3\u675f\u4f4d\u7f6e\u7684bc\u00a0\u00a0<\/span><\/li>\n
                                          2. str\u00a0=“add”<\/span>;<\/li>\n
                                          3. alert(re.test(str));\/\/true\u00a0\u00a0<\/span><\/li>\n
                                          4. re\u00a0=\u00a0\/^(a|bc)$\/;\/\/\u5c06\u5339\u914da\u6216bc\u00a0\u00a0<\/span><\/li>\n
                                          5. str\u00a0=“bc”<\/span>;<\/li>\n
                                          6. alert(re.test(str));\/\/true\u00a0\u00a0<\/span><\/li>\n<\/ol>\n<\/div>\n<\/div>\n

                                            \u5f53\u5305\u542b\u5206\u7ec4\u7684\u6b63\u5219\u8868\u8fbe\u5f0f\u8fdb\u884c\u8fc7test,match,search\u8fd9\u4e9b\u65b9\u6cd5\u4e4b\u540e\uff0c\u6bcf\u4e2a\u5206\u7ec4\u90fd\u88ab\u653e\u5728\u4e00\u4e2a\u7279\u6b8a\u7684\u5730\u65b9\u4ee5\u5907\u5c06\u6765\u4f7f\u7528\uff0c\u8fd9\u4e9b\u5b58\u50a8\u662f\u5206\u7ec4\u4e2d\u7684\u7279\u6b8a\u503c\uff0c\u6211\u4eec\u79f0\u4e4b\u4e3a\u53cd\u5411\u5f15\u7528<\/p>\n

                                            \n
                                            JavaScript Code<\/span>\u590d\u5236\u5185\u5bb9\u5230\u526a\u8d34\u677f<\/span><\/div>\n
                                            \n
                                              \n
                                            1. var<\/span>\u00a0re\u00a0=\u00a0\/(A?(B?(C?)))\/;<\/li>\n
                                            2. \/*\u4e0a\u9762\u7684\u6b63\u5219\u8868\u8fbe\u5f0f\u5c06\u4f9d\u6b21\u4ea7\u751f\u4e09\u4e2a\u5206\u7ec4\u00a0<\/span><\/li>\n
                                            3. (A?(B?(C?)))\u00a0\u6700\u5916\u9762\u7684\u00a0<\/span><\/li>\n
                                            4. (B?(C?))\u00a0<\/span><\/li>\n
                                            5. (C?)*\/<\/span><\/li>\n
                                            6. str\u00a0=\u00a0“ABC”<\/span>;<\/li>\n
                                            7. re.test(str);\/\/\u53cd\u5411\u5f15\u7528\u88ab\u5b58\u50a8\u5728RegExp\u5bf9\u8c61\u7684\u9759\u6001\u5c5e\u6027$1\u2014$9\u4e2d\u00a0\u00a0<\/span><\/li>\n
                                            8. alert(RegExp.$1+“\\n”<\/span>+RegExp.$2+“\\n”<\/span>+RegExp.$3);<\/li>\n
                                            9. \/\/\u53cd\u5411\u5f15\u7528\u4e5f\u53ef\u4ee5\u5728\u6b63\u5219\u8868\u8fbe\u5f0f\u4e2d\u4f7f\u7528\\1\u00a0,\\2…\u8fd9\u7c7b\u7684\u5f62\u5f0f\u4f7f\u7528\u00a0\u00a0<\/span><\/li>\n
                                            10. re\u00a0=\u00a0\/\\d+(\\D)\\d+\\1\\d+\/;<\/li>\n
                                            11. str\u00a0=\u00a0“2008-1-1”<\/span>;<\/li>\n
                                            12. alert(re.test(str));\/\/true\u00a0\u00a0<\/span><\/li>\n
                                            13. str\u00a0=\u00a0“2008-4_3”<\/span>;<\/li>\n
                                            14. alert(re.test(str));\/\/false\u00a0\u00a0<\/span><\/li>\n<\/ol>\n<\/div>\n<\/div>\n

                                              \"6c17cae3gbe56f1887291&690\"<\/a>
                                              \n\u4f7f\u7528\u53cd\u5411\u5f15\u7528\u53ef\u4ee5\u8981\u6c42\u5b57\u7b26\u4e32\u4e2d\u67d0\u51e0\u4e2a\u4f4d\u7f6e\u4e0a\u7684\u5b57\u7b26\u5fc5\u987b\u76f8\u540c.\u53e6\u5916\uff0c\u5728replace\u8fd9\u7c7b\u65b9\u6cd5\u4e2d\u53ef\u7528\u7279\u6b8a\u5b57\u7b26\u5e8f\u5217\u6765\u8868\u793a\u53cd\u5411\u5f15\u7528<\/p>\n

                                              \n
                                              JavaScript Code<\/span>\u590d\u5236\u5185\u5bb9\u5230\u526a\u8d34\u677f<\/span><\/div>\n
                                              \n
                                                \n
                                              1. re\u00a0=\u00a0\/(\\d)\\s(\\d)\/;<\/li>\n
                                              2. str\u00a0=\u00a0“1234\u00a05678”<\/span>;<\/li>\n
                                              3. alert(str.replace(re,“$2\u00a0$1”<\/span>));\/\/\u5728\u8fd9\u4e2a\u91cc\u9762$1\u8868\u793a\u7b2c\u4e00\u4e2a\u5206\u7ec41234,$2\u5219\u8868\u793a5678\u00a0\u00a0<\/span><\/li>\n<\/ol>\n<\/div>\n<\/div>\n

                                                \u5176\u5b83\u2014\u2014\u3009\u6b63\u5411\u524d\u77bb,\u7528\u6765\u6355\u83b7\u51fa\u73b0\u5728\u7279\u5b9a\u5b57\u7b26\u4e4b\u524d\u7684\u5b57\u7b26,\u53ea\u6709\u5f53\u5b57\u7b26\u540e\u9762\u8ddf\u7740\u67d0\u4e2a\u7279\u5b9a\u5b57\u7b26\u624d\u53bb\u6355\u83b7\u5b83\u3002\u4e0e\u6b63\u5411\u524d\u77bb\u5bf9\u5e94\u7684\u6709\u8d1f\u5411\u524d\u77bb\uff0c\u5b83\u7528\u5339\u914d\u53ea\u6709\u5f53\u5b57\u7b26\u540e\u9762\u4e0d\u8ddf\u7740\u67d0\u4e2a\u7279\u5b9a\u5b57\u7b26\u65f6\u624d\u53bb\u5339\u914d\u5b83\u3002\u5728\u6267\u884c\u524d\u77bb\u548c\u8d1f\u5411\u524d\u77bb\u4e4b\u7c7b\u7684\u8fd0\u7b97\u65f6\uff0c\u6b63\u5219\u8868\u8fbe\u5f0f\u5f15\u64ce\u4f1a\u7559\u610f\u5b57\u7b26\u4e32\u540e\u9762\u7684\u90e8\u5206\uff0c\u7136\u800c\u5374\u4e0d\u79fb\u52a8index<\/p>\n

                                                \n
                                                JavaScript Code<\/span>\u590d\u5236\u5185\u5bb9\u5230\u526a\u8d34\u677f<\/span><\/div>\n
                                                \n
                                                  \n
                                                1. \/\/\u6b63\u5411\u524d\u77bb\u00a0\u00a0<\/span><\/li>\n
                                                2. re\u00a0=\u00a0\/([a-z]+(?=\\d))\/i;<\/li>\n
                                                3. \/\/\u6211\u4eec\u8981\u5339\u914d\u540e\u9762\u8ddf\u4e00\u4e2a\u6570\u5b57\u7684\u5355\u8bcd\uff0c\u7136\u540e\u5c06\u5355\u8bcd\u8fd4\u56de\uff0c\u800c\u4e0d\u8981\u8fd4\u56de\u6570\u5b57\u00a0\u00a0<\/span><\/li>\n
                                                4. str\u00a0=\u00a0“abc\u00a0every1\u00a0abc”<\/span>;<\/li>\n
                                                5. alert(re.test(str));\/\/true\u00a0\u00a0<\/span><\/li>\n
                                                6. alert(RegExp.$1);\/\/every\u00a0\u00a0<\/span><\/li>\n
                                                7. alert(re.lastIndex);\/\/\u4f7f\u7528\u524d\u77bb\u7684\u597d\u5904\u662f,\u524d\u77bb\u7684\u5185\u5bb9(?=\\d)\u5e76\u4e0d\u4f1a\u5f53\u6210\u4e00\u6b21\u5339\u914d\uff0c\u4e0b\u6b21\u5339\u914d\u4ecd\u4ece\u5b83\u5f00\u59cb\u00a0\u00a0<\/span><\/li>\n
                                                8. \/\/\u8d1f\u5411\u524d\u77bb(?!)\u00a0\u00a0<\/span><\/li>\n
                                                9. re\u00a0=\u00a0\/([a-z](?!\\d))\/;i<\/li>\n
                                                10. \/\/\u5c06\u5339\u914d\u540e\u9762\u4e0d\u5305\u542b\u6570\u5b57\u7684\u5b57\u6bcd,\u5e76\u4e14\u4e0d\u4f1a\u8fd4\u56de(?!\\d)\u4e2d\u7684\u5185\u5bb9\u00a0\u00a0<\/span><\/li>\n
                                                11. str\u00a0=\u00a0“abc1\u00a0one”<\/span>;<\/li>\n
                                                12. alert(re.test(str));<\/li>\n
                                                13. alert(RegExp.$1);\/\/one\u00a0\u00a0<\/span><\/li>\n<\/ol>\n<\/div>\n<\/div>\n

                                                  \u6784\u5efa\u4e00\u4e2a\u9a8c\u8bc1\u7535\u5b50\u90ae\u7bb1\u5730\u5740\u6709\u6548\u6027\u7684\u6b63\u5219\u8868\u8fbe\u5f0f\u3002\u7535\u5b50\u90ae\u7bb1\u5730\u5740\u6709\u6548\u6027\u8981\u6c42(\u6211\u4eec\u59d1\u4e14\u8fd9\u6837\u5b9a\u4e49)\uff1a\u7528\u6237\u540d\u53ea\u80fd\u5305\u542b\u5b57\u6bcd\u6570\u5b57\u4ee5\u53ca\u4e0b\u5212\u7ebf\uff0c\u6700\u5c11\u4e00\u4f4d\uff0c\u6700\u591a25\u4f4d\uff0c\u7528\u6237\u540d\u540e\u9762\u7d27\u8ddf@\uff0c\u540e\u9762\u662f\u57df\u540d\uff0c\u57df\u540d\u540d\u79f0\u8981\u6c42\u53ea\u80fd\u5305\u542b\u5b57\u6bcd\u6570\u5b57\u548c\u51cf\u53f7\uff08-\uff09\uff0c\u5e76\u4e14\u4e0d\u80fd\u4ee5\u51cf\u53f7\u5f00\u5934\u6216\u7ed3\u5c3e\uff0c\u7136\u540e\u540e\u9762\u662f\u57df\u540d\u540e\u7f00\uff08\u53ef\u4ee5\u6709\u591a\u4e2a\uff09\uff0c\u57df\u540d\u540e\u7f00\u5fc5\u987b\u662f\u70b9\u53f7\u8fde\u4e0a2-4\u4f4d\u82f1\u6587\u5b57\u6bcd<\/p>\n

                                                  \n
                                                  JavaScript Code<\/span>\u590d\u5236\u5185\u5bb9\u5230\u526a\u8d34\u677f<\/span><\/div>\n
                                                  \n
                                                    \n
                                                  1. var<\/span>\u00a0re\u00a0=\u00a0\/^\\w{1,15}(?:@(?!-))(?:(?:[a-z0-9-]*)(?:[a-z0-9](?!-))(?:\\.(?!-)))+[a-z]{2,4}$\/;<\/li>\n<\/ol>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

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