JavaScript正则表达式用法-优快云博客

JavaScript正则表达式用法
 
演示：http://www.huiyi8.com/jiaoben/
javascript特效
 
  <!-- 更多信息可以参考 http: 
  //hi.baidu.com/jxqlovejava/item/4160b33ab4414d82f4e4ad4b --> 
 
  <script type= 
  "text/javascript" 
  > 
 
  var 
  matchedTimes = 0; 
 
  //Match one d followed by one or more b's followed by one d 
 
  //Remember matched b's and the following d 
 
  //Ignore case 
 
  myRe    =  
  new 
  RegExp( 
  "d(b+)(d)" 
  ,  
  "ig" 
  );  
  // 等价于 myReg = /d(b+)(d)/ig; 
 
  myArray = myRe.exec( 
  "ecDBDsdbbdz" 
  );  
  // ecdbBdbsdbbdz 
 
  console.log( 
  "Regular Expression String: " 
  + myRe.source); 
 
  console.log( 
  "Is global? " 
  + myRe.global); 
 
  console.log( 
  "Ignore case? " 
  + myRe.ignoreCase); 
 
  console.log( 
  "Is mulitiline? " 
  + myRe.multiline); 
 
  console.log( 
  "------------------------------------------------" 
  ); 
 
  logInfo(myArray, myRe); 
 
  myArray = myRe.exec( 
  "ecDBDsdbbdz" 
  ); 
 
  logInfo(myArray, myRe); 
 
  function 
  logInfo(myArray, myRe) { 
 
  matchedTimes++; 
 
  console.log( 
  "This is " 
  + matchedTimes +  
  " times match" 
  ); 
 
  console.log( 
  "Original String: " 
  + myArray.input); 
 
  console.log( 
  "Match Result Array: [" 
  + myArray +  
  "]" 
  ); 
 
  console.log( 
  "The 0-based index of the match in the string: " 
  + myArray.index); 
 
  console.log( 
  "The last matched characters: " 
  + myArray[0]); 
 
  console.log( 
  "The parenthesized substring matches [1]: " 
  + myArray[1]); 
 
  console.log( 
  "The parenthesized substring matches [2]: " 
  + myArray[2]); 
 
  console.log( 
  "The index at which to start the next match: " 
  + myRe.lastIndex); 
 
  console.log( 
  "-----------------------------------------------" 
  ); 
 
  } 
 
  myRe2 = /^\w+(\d*)$/ig 
 
  console.log( 
  "myRe2: " 
  + myRe2.source); 
 
  //console.log("myRe2 matches abc1? " + myRe2.test("abc1")); // 加上这行跑跑看结果，因为是global匹配，所以lastIndex会改变，所以后面的myRe2.test("abc")当然就是false 
 
  console.log( 
  "myRe2 matches abc? " 
  + myRe2.test( 
  "abc" 
  )); 
 
  </script>