这篇文章主要介绍了JavaScript使用RegExp进行正则匹配的方法,实例分析了RegExp对象在进行正则匹配时的相关使用技巧,需要的朋友可以参考下
本文实例讲述了JavaScript使用RegExp进行正则匹配的方法。分享给大家供大家参考。具体实现方法如下:
- <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>
希望本文所述对大家的javascript程序设计有所帮助。
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