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install-ripgrep
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听闻<a href="https://github.com/BurntSushi/ripgrep" target="_blank" rel="external">ripgrep</a>有着grep的速度以及ag的功能，这里简单
记录下rg的安装过程。
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<blockquote class="blockquote-center"><p>不闻不若闻之，闻之不若见之，见之不若知之，知之不若行之。</p>
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linux poll分析
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在上层应用中使用系统调用，最终都会调用到内核中提供的接口，对于 <code>poll</code> ，与之相对应的即为 <code>sys_poll</code> 函数。
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<h2 id="orgb5a32b9">sys_poll</h2>
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sys_poll函数的实现在内核中的 <a href="http://lxr.free-electrons.com/source/fs/select.c#L971" target="_blank" rel="external">fs/select.c</a> 文件中:
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<figure class="highlight c"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br></pre></td><td class="code"><pre><span class="line">SYSCALL_DEFINE3(poll, <span class="keyword">struct</span> pollfd __user *, ufds, <span class="keyword">unsigned</span> <span class="keyword">int</span>, nfds,</span><br><span class="line"> <span class="keyword">int</span>, timeout_msecs)</span><br><span class="line">{</span><br><span class="line"> ...</span><br><span class="line"></span><br><span class="line"> <span class="comment">/* 在这里调用do_sys_poll */</span></span><br><span class="line"> ret = do_sys_poll(ufds, nfds, to);</span><br><span class="line"></span><br><span class="line"> ...</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
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从markdow到org的迁移
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这是一篇来自org+hexo的测试文章，依然采用travis进行持续集成，部署到github和coding.net。
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python元类浅析(第二季)
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<p id="div-border-top-blue">上一篇文章中已经讲述了什么是metaclass，metaclass类似创建类的模板，继承自type类，
通过重写<span id="inline-green">__new__</span>方法控制类的创建行为。</p>
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YouCompleteMe笔记
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<h3 id="Build-Vim8-From-Source"><a href="#Build-Vim8-From-Source" class="headerlink" title="Build Vim8 From Source"></a>Build Vim8 From Source</h3><hr>
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<li>卸载旧版本的vim</li>
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<figure class="highlight sh"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div></pre></td><td class="code"><pre><div class="line">sudo apt-get remove vim vim-runtime gvim</div><div class="line">sudo apt-get remove vim-tiny vim-common vim-gui-common vim-nox</div></pre></td></tr></table></figure>
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