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  • 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>
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  • 原文地址:https://www.cnblogs.com/lhrs/p/4165315.html
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