JavaScript正则表达式用法

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>