用awk写一个脚本，提取每行第一次出现的单词。

朱雀 2022-08-11 05:28 139阅读 0赞

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**用awk写一个脚本，提取每行第一次出现的单词。**

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          是每行出现的第一个单词吗？上面的例子全是user? 
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          <a title="复制帖子链接到剪贴板" href="http://writeblog.csdn.net/###" rel="nofollow">3楼</a> 发表于 2009-2-7 14:43&nbsp; 
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            sed -r 's/[^a-zA-Z]*([a-zA-Z]*).*//1/' urfile 
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          <a title="复制帖子链接到剪贴板" href="http://writeblog.csdn.net/###" rel="nofollow">4楼</a> 发表于 2009-2-7 16:19&nbsp; 
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          是不是每行可能包含多个单词，每个单词可能重复出现 
        </div> <br style="clear: both;"><br><br></td> 
      </tr> 
      <tr> 
       <td>您对本贴的看法：<a href="http://writeblog.csdn.net/postappraise.php?action=sustain&amp;fid=24&amp;tid=1364558&amp;pid=10026402&amp;page=1&amp;extra=page%3D1" rel="nofollow">鲜花[0]</a> <a href="http://writeblog.csdn.net/postappraise.php?action=oppose&amp;fid=24&amp;tid=1364558&amp;pid=10026402&amp;page=1&amp;extra=page%3D1" rel="nofollow">臭蛋[0]</a></td> 
      </tr> 
      <tr> 
       <td><br>__________________________________<br><br>天行健，君子以自强不息<br>发奋忘食，乐以忘优，不知老之将至<br>温故而知新<br></td> 
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   <td><a rel="nofollow"></a><a href="http://writeblog.csdn.net/profile-uid-791776.html" rel="nofollow"><span style="font-family: Fixedsys;">jean2e</span></a> <br> 
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          <a title="复制帖子链接到剪贴板" href="http://writeblog.csdn.net/###" rel="nofollow">5楼</a> 发表于 2009-2-7 16:28&nbsp; 
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        <div> 
         <br> 
         <br> 
         <div> 
          <div>
            QUOTE: 
          </div> 
          <div>
            原帖由 
           <em>ynchnluiti</em> 于 2009-2-7 16:19 发表 
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           <br>是不是每行可能包含多个单词，每个单词可能重复出现 
          </div> 
         </div> 
         <br>是的！ 
        </div> <br style="clear: both;"><br><br></td> 
      </tr> 
      <tr> 
       <td>您对本贴的看法：<a href="http://writeblog.csdn.net/postappraise.php?action=sustain&amp;fid=24&amp;tid=1364558&amp;pid=10026439&amp;page=1&amp;extra=page%3D1" rel="nofollow">鲜花[0]</a> <a href="http://writeblog.csdn.net/postappraise.php?action=oppose&amp;fid=24&amp;tid=1364558&amp;pid=10026439&amp;page=1&amp;extra=page%3D1" rel="nofollow">臭蛋[0]</a></td> 
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       <td style="padding: 5px;"></td> 
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   <td><a rel="nofollow"></a><a href="http://writeblog.csdn.net/profile-uid-791776.html" rel="nofollow"><span style="font-family: Fixedsys;">jean2e</span></a> <br> 
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          <a title="复制帖子链接到剪贴板" href="http://writeblog.csdn.net/###" rel="nofollow">6楼</a> 发表于 2009-2-7 16:30&nbsp; 
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         <br> 
         <br> 
         <div> 
          <div>
            QUOTE: 
          </div> 
          <div>
            原帖由 
           <em>haimming</em> 于 2009-2-7 14:43 发表 
           <a href="http://bbs2.chinaunix.net/redirect.php?goto=findpost&amp;pid=10026181&amp;ptid=1364558" rel="nofollow"><img src="http://bbs2.chinaunix.net/images/common/back.gif" alt=""></a> 
           <br> 
           <br>sed -r 's/[^a-zA-Z]*([a-zA-Z]*).*//1/' urfile 
           <br> 
          </div> 
         </div> 
         <br>谢了。我主要想知道用awk解决的方法:mrgreen: 
        </div> <br style="clear: both;"><br><br></td> 
      </tr> 
      <tr> 
       <td>您对本贴的看法：<a href="http://writeblog.csdn.net/postappraise.php?action=sustain&amp;fid=24&amp;tid=1364558&amp;pid=10026446&amp;page=1&amp;extra=page%3D1" rel="nofollow">鲜花[0]</a> <a href="http://writeblog.csdn.net/postappraise.php?action=oppose&amp;fid=24&amp;tid=1364558&amp;pid=10026446&amp;page=1&amp;extra=page%3D1" rel="nofollow">臭蛋[0]</a></td> 
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    <div>
      大天使 
     <br>打破水锅问到底。 
     <br> 
     <br> 
     <table style="table-layout: fixed; overflow: hidden; width: 95%;"> 
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        <td align="center"> 
         <div style="width: 120px;"> 
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     <br>UID：713644 
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     <a title="查看推广积分规则" href="http://bbs.chinaunix.net/thread-1262450-1-1.html" rel="nofollow">推广积分：30 </a> 
     <br> 
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           [ 
          <a href="http://writeblog.csdn.net/misc.php?action=emailfriend&amp;tid=1364558" rel="nofollow">推广获积分</a>] 
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          <a title="复制帖子链接到剪贴板" href="http://writeblog.csdn.net/###" rel="nofollow">7楼</a> 发表于 2009-2-7 20:53&nbsp; 
         </div> 
        </div> </td> 
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       <td style="padding-top: 10px;"> 
        <div> 
         <br> 
         <br> 
         <div> 
          <div> 
           <div> 
            <a href="http://writeblog.csdn.net/###" rel="nofollow">[Copy to clipboard]</a> 
            <a href="http://writeblog.csdn.net/###" rel="nofollow">[ <span>-</span> ]</a> 
           </div> CODE: 
          </div> 
          <div>
            awk -F'[^a-zA-Z]+' '{print $2}' 　ufile 
          </div> 
         </div> 
         <br>[test@erpdataserver ~]$ cat 1 
         <br>111:user:x:1000:(www-data id):(?):(?) 
         <br>111:222:user:x:1000:(www-data id):(?):(?) 
         <br>111:user:x:1000:(www-data id):(?):(?) 
         <br>[test@erpdataserver ~]$ awk -F'[^a-zA-Z]+' '{print $2}' 1 
         <br>user 
         <br>user 
         <br>user 
        </div> <br style="clear: both;"><br><br></td> 
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       <td>您对本贴的看法：<a href="http://writeblog.csdn.net/postappraise.php?action=sustain&amp;fid=24&amp;tid=1364558&amp;pid=10027076&amp;page=1&amp;extra=page%3D1" rel="nofollow">鲜花[0]</a> <a href="http://writeblog.csdn.net/postappraise.php?action=oppose&amp;fid=24&amp;tid=1364558&amp;pid=10027076&amp;page=1&amp;extra=page%3D1" rel="nofollow">臭蛋[0]</a></td> 
      </tr> 
      <tr> 
       <td><br>__________________________________<br><br>要看的书太多了。。<br></td> 
      </tr> 
      <tr> 
       <td style="padding: 5px;"></td> 
      </tr> 
     </tbody> 
    </table> </td> 
  </tr> 
 </tbody> 
</table>

<table style="margin-bottom: 1px; width: 98%; word-wrap: break-word;"> 
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   <td><a rel="nofollow"></a><a href="http://writeblog.csdn.net/profile-uid-713644.html" rel="nofollow"><span style="font-family: Fixedsys;">我是DBA</span></a> &nbsp;&nbsp;<img src="http://writeblog.csdn.net/images/default/icon_minigender_male.gif" alt="帅哥"> <span>(我在学习，我要进步)</span> <br> 
    <div>
      大天使 
     <br>打破水锅问到底。 
     <br> 
     <br> 
     <table style="table-layout: fixed; overflow: hidden; width: 95%;"> 
      <tbody> 
       <tr> 
        <td align="center"> 
         <div style="width: 120px;"> 
          <img src="http://writeblog.csdn.net/customavatars/713644.jpg" alt="" width="120" height="90"> 
         </div> </td> 
       </tr> 
      </tbody> 
     </table> 
     <br> 
     <img src="http://writeblog.csdn.net/images/default/level/pips6.gif" alt=""> 
     <br>UID：713644 
     <br>注册：2008-6-3 
     <br>最后登录： 2009-02-09 
     <br>帖子： 
     <a href="http://s.chinaunix.net/bbs.php?q=&amp;username=我是DBA&amp;st=post&amp;bbs=1&amp;forums=all" rel="nofollow"><span style="text-decoration: underline;">2447</span></a> 
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     <br> 
     <br> 
     <a title="查看可用积分规则" href="http://bbs.chinaunix.net/thread-1191761-1-1.html" rel="nofollow">可用积分：7481 (富足长乐) </a> 
     <br> 
     <a title="发表悬赏帖，并采纳正确答案后，信誉分增加，不采纳则将可能减少" href="http://bbs.chinaunix.net/thread-1191761-1-1.html" rel="nofollow">信誉积分：10 </a> 
     <br> 
     <a title="专家积分通过正确回答悬赏帖，并被提问者采纳后获得" href="http://bbs.chinaunix.net/procredits.php?uid=713644" rel="nofollow">专家积分：25 (本版:25)</a> 
     <br> 
     <a title="查看空间积分规则" href="http://bbs.chinaunix.net/thread-1254591-1-1.html" rel="nofollow">空间积分：808 </a> 
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     <a title="查看推广积分规则" href="http://bbs.chinaunix.net/thread-1262450-1-1.html" rel="nofollow">推广积分：30 </a> 
     <br> 
     <br>状态： 
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   <td style="padding: 0px;"> 
    <table> 
     <tbody> 
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       <td> 
        <div> 
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          <a title="复制帖子链接到剪贴板" href="http://writeblog.csdn.net/###" rel="nofollow">8楼</a> 发表于 2009-2-7 21:46&nbsp; 
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       <td style="padding-top: 10px;"><span>回复 #7 我是DBA 的帖子</span><br><br> 
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          自己写完才发现awk好强大。 
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       <td><br>__________________________________<br><br>要看的书太多了。。<br></td> 
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          <a title="复制帖子链接到剪贴板" href="http://writeblog.csdn.net/###" rel="nofollow">9楼</a> 发表于 2009-2-7 21:55&nbsp; 
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       <td style="padding-top: 10px;"><span>回复 #8 我是DBA 的帖子</span><br><br> 
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          看了你们的例子，有同感 
         <br>学好了sed我就学awk！ 
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          <a title="复制帖子链接到剪贴板" href="http://writeblog.csdn.net/###" rel="nofollow">10楼</a> 发表于 2009-2-7 22:00&nbsp; 
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       <td style="padding-top: 10px;"><span>回复 #8 我是DBA 的帖子</span><br><br> 
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          很过功能都可以是实现的 
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[2]: http://writeblog.csdn.net/thread-1364558-2-1.html
[3]: http://writeblog.csdn.net/thread-1364558-3-1.html
[4]: http://writeblog.csdn.net/thread-1364558-4-1.html