這篇文章主要介紹了JavaScript使用RegExp進行正則匹配的方法,實例分析了RegExp對象在進行正則匹配時的相關使用技巧,需要的朋友可以參考下
本文實例講述了JavaScript使用RegExp進行正則匹配的方法。分享給大家供大家參考。具體實現方法如下:
- <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");
- // 等價于 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"));
- // 加上這行跑跑看結果,因為是global匹配,所以lastIndex會改變,
- //所以后面的myRe2.test("abc")當然就是false
- console.log("myRe2 matches abc? " + myRe2.test("abc"));
- </script>
希望本文所述對大家的javascript程序設計有所幫助。
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