Chun Tian (binghe)

超越自我，洞察宇宙

日志

关于我

冰河

Common Lisp 程序员, 毽球运动员, 跆拳道黑带一段

文章分类

LOFTER精选

八招诀窍，教你实力撩妹 >

网易考拉推荐

梦见一棵树

2007-09-21 05:59:53| 分类： Lisp | 标签： |举报 |字号大中小订阅

下载LOFTER 我的照片书 |

确切地说是一棵用来存放 SNMP MIB 信息的 Lisp 多叉树。太兴奋了，困扰了我三天的存储难题做梦时解决了，想到一个完全不浪费一点儿空间，又能保证高效访问的绝妙的数据结构。于是马上起床兴奋地写代码……

((NIL NIL NIL)
(((1) ("iso") #<OBJECT-ID 1(iso)>)
(((3 1) ("org" "iso") #<OBJECT-ID 1.3(iso.org)>)
   (((6 3 1) ("dod" "org" "iso") #<OBJECT-ID 1.3.6(iso.org.dod)>)
    (((1 6 3 1) ("internet" "dod" "org" "iso") #<OBJECT-ID 1.3.6.1(iso.org.dod.internet)>)
     (((1 1 6 3 1)
       ("directory" "internet" "dod" "org" "iso")
       #<OBJECT-ID 1.3.6.1.1(iso.org.dod.internet.directory)>))
     (((2 1 6 3 1)
       ("mgmt" "internet" "dod" "org" "iso")
       #<OBJECT-ID 1.3.6.1.2(iso.org.dod.internet.mgmt)>))
     (((3 1 6 3 1)
       ("experimental" "internet" "dod" "org" "iso")
       #<OBJECT-ID 1.3.6.1.3(iso.org.dod.internet.experimental)>))
     (((4 1 6 3 1)
       ("private" "internet" "dod" "org" "iso")
       #<OBJECT-ID 1.3.6.1.4(iso.org.dod.internet.private)>)
      (((1 4 1 6 3 1)
        ("enterprises" "private" "internet" "dod" "org" "iso")
        #<OBJECT-ID 1.3.6.1.4.1(iso.org.dod.internet.private.enterprises)>))))))))
看起来可能觉得有大量重复，其实所有的数字和字符串都只有一份，重复引用而已。

评论这张

转发至微博

阅读(1225)| 评论(6)

推荐转载

历史上的今天

在LOFTER的更多文章

this.p={  m:2,
              b:2,
              loftPermalink:'',
              id:'fks_087065084087086075085087085095083086081066',
              blogTitle:'梦见一棵树',
              blogAbstract:'确切地说是一棵用来存放 SNMP MIB 信息的 Lisp 多叉树。太兴奋了，困扰了我三天的存储难题做梦时解决了，想到一个完全不浪费一点儿空间，又能保证高效访问的绝妙的数据结构。于是马上起床兴奋地写代码……<br\><br\><small style=\"color: rgb(255, 0, 0);\"\><span style=\"font-family: Courier;\"\>((NIL NIL NIL)</span\><br style=\"font-family: Courier;\"\>\r\n<span style=\"font-family: Courier;\"\> (((1) (\"iso\") #<OBJECT-ID 1(iso)>)</span\><br style=\"font-family: Courier;\"\>\r\n<span style=\"font-family: Courier;\"\>  (((3 1) (\"org\" \"iso\") #<OBJECT-ID 1.3(iso.org)>)</span\><br style=\"font-family: Courier;\"\>\r\n<span style=\"font-family: Courier;\"\>   (((6 3 1) (\"dod\" \"org\" \"iso\") #<OBJECT-ID 1.3.6(iso.org.dod)>)</span\></small\>',
              blogTag:'',
              blogUrl:'blog/static/7001200782155953194',
              isPublished:1,
              istop:false,
              type:0,
              modifyTime:1190362194925,
              publishTime:1190325593194,
              permalink:'blog/static/7001200782155953194',
              commentCount:6,
              mainCommentCount:6,
              recommendCount:0,
              bsrk:-100,
              publisherId:0,
              recomBlogHome:false,
              currentRecomBlog:false,
              attachmentsFileIds:[],
              vote:{},
              groupInfo:{},
              friendstatus:'none',
              followstatus:'unFollow',
              pubSucc:'',
              visitorProvince:'',
              visitorCity:'',
              visitorNewUser:false,
              postAddInfo:{},
              mset:'000',
              mcon:'',
              srk:-100,
              remindgoodnightblog:false,
              isBlackVisitor:false,
              isShowYodaoAd:false,
              hostIntro:'Common Lisp 程序员, 毽球运动员, 跆拳道黑带一段',
              hmcon:'0',
              selfRecomBlogCount:'0',
              lofter_single:'<a hidefocus="true" target="_blank" href="http://inpin.blog.163.com/blog/static/2633040402016620112520219/"><img onload="var nimg = new Image(); nimg.src=\'http://blog.163.com/newpage/images/analyse.png?lofter_single&t=\'+new Date().getTime()" border="0" src="http://imglf.nosdn.127.net/img/TlZCWHdFWFpidkQ1dGtJK1N5cFRBNzBLUFFPYnJEVi9LWk1KTzJlMTU2Yz0.jpg"/></a>'
            }

{list a as x}
    {if !!x}
    <div class="iblock nbw-fce nbw-f40">
      <a class="fc03 noul" target="_blank" hidefocus="true" href="http://blog.163.com/${x.visitorName}/">
      {if x.visitorName==visitor.userName}
      <img alt="${x.visitorNickname|escape}" onerror="this.src=location.f40" class="cwd bdwa bdc0" src="${fn1(x.visitorName)}&r=${visitor.imageUpdateTime}"/>
      {else}
      <img alt="${x.visitorNickname|escape}" onerror="this.src=location.f40" class="cwd bdwa bdc0" src="${fn1(x.visitorName)}"/>
      {/if}
      </a>
      <div class="cwd vname thide">
        {if x.moveFrom=='wap'}
          <a class="noul pnt" target="_blank" href="http://blog.163.com/services/wapblog.html?frompersonalbloghome"><span title="来自网易手机博客" class="iblock wapIcon"> </span></a>
        {elseif x.moveFrom=='iphone'}
          <a class="noul pnt" target="_blank"><span title="来自iPhone客户端" class="iblock iphoneIcon"> </span></a>
        {elseif x.moveFrom=='android'}
          <a class="noul pnt" target="_blank"><span title="来自Android客户端" class="iblock androidIcon"> </span></a>
        {elseif x.moveFrom=='mobile'}
          <a class="noul pnt" target="_blank" href="http://blog.163.com/services/emsblog.html?frompersonalbloghome"><span title="来自网易短信写博" class="iblock wapIcon"> </span></a>
        {/if}
        <a class="fc03 m2a"  target="_blank" hidefocus="true" href="http://blog.163.com/${x.visitorName}/">
          ${fn(x.visitorNickname,8)|escape}
        </a>
      </div>
    </div>
    {/if}
    {/list}

<#--最新日志，群博日志--> <#--推荐日志-->

<p class="fc06">推荐过这篇日志的人：</p>
    <div>
      {list a as x}
      {if !!x}
      <div class="iblock nbw-fce nbw-f40">
        <a class="fc03 noul" target="_blank" hidefocus="true" href="http://blog.163.com/${x.recommenderName}/">
        <img alt="${x.recommenderNickname|escape}" onerror="this.src=location.f40" class="cwd bdwa bdc0" src="${fn1(x.recommenderName)}"/>
        </a>
        <div class="cwd thide">
          <a class="fc03 m2a" target="_blank" hidefocus="true" href="http://blog.163.com/${x.recommenderName}/">
            ${fn(x.recommenderNickname,6)|escape}
          </a>
        </div>
      </div>
      {/if}
      {/list}
    </div>
    {if !!b&&b.length>0}
    <p  class="fc06">他们还推荐了：</p>
    <ul>
    {list b as y}
      {if !!y}
        <li class="rrb"><span class="iblock">·</span><a class="fc03 m2a" target="_blank" href="http://blog.163.com/${y.recommendBlogPermalink}/?from=blog/static/7001200782155953194">${y.recommendBlogTitle|escape}</a></li>
      {/if}
    {/list}
    </ul>
    {/if}

<#--引用记录--> <#--博主推荐--> <#--随机阅读--> <#--首页推荐--> <#--历史上的今天--> <#--被推荐日志--> <#--上一篇，下一篇--> <#-- 热度 -->

{list a as x}
    {if !!x}
    <div class="hotItem iblock nbw-fce nbw-f40">
      <a class="fc03 noul" target="_blank" hidefocus="true" href="http://blog.163.com/${x.publisherUsername}/">
      {if x.publisherUsername==visitor.userName}
      <img alt="${x.publisherNickname|escape}" onerror="this.src=location.f40" class="cwd bdwa bdc0" src="${fn1(x.publisherUsername)}&r=${visitor.imageUpdateTime}"/>
      {else}
      <img alt="${x.publisherNickname|escape}" onerror="this.src=location.f40" class="cwd bdwa bdc0" src="${fn1(x.publisherUsername)}"/>
      {/if}
      </a>
      <div class="cwd vname thide">
        <a class="fc03 m2a"  target="_blank" hidefocus="true" href="http://blog.163.com/${x.publisherUsername}/">
          ${fn(x.publisherNickname,8)|escape}
        </a>
      </div>
      <a class="f-myLikeIcons hottype {if x.type==1} js-liketype{elseif x.type==2} js-reblogtype{elseif x.type==3} js-sharetype{else}{/if}" target="_blank" hidefocus="true" href="http://blog.163.com/${x.publisherUsername}/"> </a>
    </div>
    {/if}
    {/list}

<#-- 网易新闻广告 --> <#--右边模块结构--> <#--评论模块结构--> <#--引用模块结构--> <#--博主发起的投票-->

页脚

我的照片书 - 博客风格 - 手机博客 - 下载LOFTER APP - 订阅此博客

Chun Tian (binghe)

导航

日志

梦见一棵树

历史上的今天

最近读者

热度

在LOFTER的更多文章

评论

页脚