javascript字符串循环匹配实例分析

// 需要提取这种数据 <td>2012-12-17</td><td>11:02 , 12:25 , 13:22 , 15:06 , 15:12 , 19:22 , 23:47</td>var rawData = '<table><th align="left" scope="col">日期</th><th align="left" scope="col">签到签退时间</th></tr><tr class="GridViewRowStyle" style="height:20px;">'    + '<td>2012-12-03</td><td>10:16 , 13:22 , 20:05</td></tr><tr class="GridViewRowStyle" style="height:20px;">'    + '<td>2012-12-04</td><td>11:16 , 14:22 , 21:05</td></tr><table>';// 方法一var regexp = /<td>(/d{4}-/d{2}-/d{2})<//td><td>(.*?)<//td>/g;// 加上g标识才会全局匹配，否则只匹配一个var matchedArray = regexp.exec(rawData);while(matchedArray != null) { console.dir(matchedArray); matchedArray = regexp.exec(rawData);}// 方法二var regexp = /<td>(/d{4}-/d{2}-/d{2})<//td><td>(.*?)<//td>/g;// 加上g标识才会全局匹配var matchedArray = rawData.match(regexp);console.dir(matchedArray);// 方法三var regexp = /<td>(/d{4}-/d{2}-/d{2})<//td><td>(.*?)<//td>/;// 不加g标识var matchedArray = rawData.match(regexp);console.dir(matchedArray);console.log(matchedArray.index);while(matchedArray != null) { rawData = rawData.substr(matchedArray.index + matchedArray[0].length); matchedArray = rawData.match(regexp);}console.dir(matchedArray);