var str = '<table><tr><td>书名</td><td>姓名</td><td>借阅情况</td><td>借阅情况</td></tr>'; for (var i = 0; i < result.rows.length; i++) { item = result.rows.item(i); str += "<tr><td>" + item["book"] + "</td><td>" + item["author"] +"</td><td>" + item["borrow"] + "</td><td><input type='button'id='" +item["id"]+ "'class='borrowItem'value='借阅'></td></tr>"; } str += "</table>";
时间: 2023-08-14 22:35:11 浏览: 37
这段代码是用 JavaScript 语言编写的,主要功能是将从数据库中获取的数据渲染成一个表格,并在每行数据末尾添加一个“借阅”按钮。其中,变量 str 存储了渲染后的 HTML 代码,通过循环遍历 result.rows 数组,将每行数据的书名、姓名和借阅情况添加到表格中。最后,将 str 变量末尾的字符串 "</table>" 添加到表格代码的最后,完成表格的生成。
相关问题
删除功能报错,请改正 <body> <div> <table id="table"> <thead>学生信息表</thead> <tr> <td id="id">编号</td> <td id="tname">姓名</td> <td>性别</td> <td>操作</td> </tr> <tr> <td>1</td> <td>nxy</td> <td>女</td> <td> <a href="Javascript:void(0);" onclick="delTr(this)">删除</a> </td> </tr> </table> </div> <script> function delTr(obj) { var tr = obj.parentNode.parentNode; var table = tr.parentNode; document.getElementsByTagName("table")[0].removeChild(tr); } </script> </body>
在这段代码中,删除功能的实现有一个错误。应该在thead标签中加入一个tr标签来包含标题行中的所有单元格,以便使其与数据行具有相同的列数。同时,应该更改thead标签的显示方式为表头,而不是普通文本。修改后的代码如下:
```
<body>
<div>
<table id="table">
<thead>
<tr>
<th>学生信息表</th>
</tr>
<tr>
<th>编号</th>
<th>姓名</th>
<th>性别</th>
<th>操作</th>
</tr>
</thead>
<tbody>
<tr>
<td>1</td>
<td>nxy</td>
<td>女</td>
<td>
<a href="Javascript:void(0);" onclick="delTr(this)">删除</a>
</td>
</tr>
</tbody>
</table>
</div>
<script>
function delTr(obj) {
var tr = obj.parentNode.parentNode;
var table = tr.parentNode;
table.removeChild(tr);
}
</script>
</body>
```
<td>2023058</td> <td>10 17 22 26 30 33 + 11</td> <td>×</td> <td>×</td> <td>×</td> <td>×</td> <td>×</td> <td>×</td> <td>×</td> <td>×</td> <td>×</td> <td>×</td> <td >0</td> </tr> <tr class="new"> <td>2023059</td> <td></td> <td>24</td> <td>10</td> <td>26</td> <td>31</td> <td>12</td> <td>33</td> <td>24</td> <td>08</td> <td>31</td> <td>24</td> <td></td> </tr> <tr> <td colspan="2">正确次数</td> <td>4</td> <td>3</td> <td>7</td> <td>2</td> <td>9</td> <td>3</td> <td>4</td> <td>5</td> <td>3</td> <td>6</td> <td></td> </tr> <tr> <td colspan="2">错误次数</td> <td>16</td> <td>17</td> <td>13</td> <td>18</td> <td>11</td> <td>17</td> <td>16</td> <td>15</td> <td>17</td> <td>14</td> <td></td> </tr> <tr> <td colspan="2">当前连对</td> <td>0</td> <td>0</td> <td>0</td> <td>0</td> <td>0</td> <td>0</td> <td>0</td> <td>0</td> <td>0</td> <td>0</td> <td></td> </tr> <tr> <td colspan="2">当前连错</td> <td>1</td> <td>4</td> <td>2</td> <td>4</td> <td>1</td> <td>7</td> <td>1</td> <td>2</td> <td>13</td> <td>3</td> <td></td> </tr> <tr> <td colspan="2">最大连对</td> <td>2</td> <td>1</td> <td>3</td> <td>1</td> <td>2</td> <td>1</td> <td>2</td> <td>2</td> <td>2</td> <td>2</td> <td></td> </tr> <tr> <td colspan="2">最大连错</td> <td>9</td> <td>7</td> <td>4</td> <td>12</td> <td>3</td> <td>7</td> <td>7</td> <td>4</td> <td>13</td> <td>3</td> <td></td> </tr> </table> </div> </div> </div> <script type="text/javascript" src="https://img.78500.cn/mobile/iscroll.js"></script> <script type="text/javascript"> var wrapper; function loaded() { wrapper = new iScroll("wrapper", { vScrollbar: false, hScrollbar: false, zoom: true, zoomMin: 0.5, zoomMax: 1 }); } document.addEventListener('touchmove', function (e) { e.preventDefault(); }, false); document.addEventListener('DOMContentLoaded', loaded, false); </script></body> </html> 对应上代码用正则表达式提取 以 <tr class="new"> 开头 </tr>结束 里面的数字
可以使用以下正则表达式进行提取:
```python
import re
text = """<table class="table table-bordered table-condensed"> <thead> <tr> <th>期号</th> <th colspan="11">开奖号码</th> <th>总和</th> </tr> </thead> <tbody> <tr class="new"> <td>2023058</td> <td>10 17 22 26 30 33 + 11</td> <td>×</td> <td>×</td> <td>×</td> <td>×</td> <td>×</td> <td>×</td> <td>×</td> <td>×</td> <td>×</td> <td>×</td> <td>0</td> </tr> <tr class="new"> <td>2023059</td> <td></td> <td>24</td> <td>10</td> <td>26</td> <td>31</td> <td>12</td> <td>33</td> <td>24</td> <td>08</td> <td>31</td> <td>24</td> <td></td> </tr> <tr> <td colspan="2">正确次数</td> <td>4</td> <td>3</td> <td>7</td> <td>2</td> <td>9</td> <td>3</td> <td>4</td> <td>5</td> <td>3</td> <td>6</td> <td></td> </tr> <tr> <td colspan="2">错误次数</td> <td>16</td> <td>17</td> <td>13</td> <td>18</td> <td>11</td> <td>17</td> <td>16</td> <td>15</td> <td>17</td> <td>14</td> <td></td> </tr> <tr> <td colspan="2">当前连对</td> <td>0</td> <td>0</td> <td>0</td> <td>0</td> <td>0</td> <td>0</td> <td>0</td> <td>0</td> <td>0</td> <td>0</td> <td></td> </tr> <tr> <td colspan="2">当前连错</td> <td>1</td> <td>4</td> <td>2</td> <td>4</td> <td>1</td> <td>7</td> <td>1</td> <td>2</td> <td>13</td> <td>3</td> <td></td> </tr> <tr> <td colspan="2">最大连对</td> <td>2</td> <td>1</td> <td>3</td> <td>1</td> <td>2</td> <td>1</td> <td>2</td> <td>2</td> <td>2</td> <td>2</td> <td></td> </tr> <tr> <td colspan="2">最大连错</td> <td>9</td> <td>7</td> <td>4</td> <td>12</td> <td>3</td> <td>7</td> <td>7</td> <td>4</td> <td>13</td> <td>3</td> <td></td> </tr> </table> </div> </div> </div> <script type="text/javascript" src="https://img.78500.cn/mobile/iscroll.js"></script> <script type="text/javascript"> var wrapper; function loaded() { wrapper = new iScroll("wrapper", { vScrollbar: false, hScrollbar: false, zoom: true, zoomMin: 0.5, zoomMax: 1 }); } document.addEventListener('touchmove', function (e) { e.preventDefault(); }, false); document.addEventListener('DOMContentLoaded', loaded, false); </script></body> </html>"""
pattern = re.compile(r'<tr class="new">(.*?)</tr>', re.S)
matches = pattern.findall(text)
for match in matches:
print(match)
```
这将输出以下内容:
```
<td>2023058</td> <td>10 17 22 26 30 33 + 11</td> <td>×</td> <td>×</td> <td>×</td> <td>×</td> <td>×</td> <td>×</td> <td>×</td> <td>×</td> <td>×</td> <td>×</td> <td>0</td>
<td>2023059</td> <td></td> <td>24</td> <td>10</td> <td>26</td> <td>31</td> <td>12</td> <td>33</td> <td>24</td> <td>08</td> <td>31</td> <td>24</td> <td></td>
```