https://ruby-china.org/valentine en-us <pre class="highlight ruby"><code><span class="k">def</span> <span class="nf">topics</span> <span class="n">url</span> <span class="o">||=</span> <span class="s1">'http://bbs.gfan.com/forum-274-1.html'</span> <span class="vi">@agent.get</span> <span class="n">url</span> <span class="k">do</span> <span class="o">|</span><span class="n">page</span><span class="o">|</span> <span class="n">list</span><span class="o">=</span> <span class="n">page</span><span class="p">.</span><span class="nf">search</span><span class="p">(</span><span class="s1">'tbody[id^=normalthread] a.xst'</span><span class="p">).</span><span class="nf">each</span> <span class="k">end</span> <span class="k">def</span> <span class="nc">list</span><span class="o">.</span><span class="nf">next</span> <span class="k">begin</span> <span class="nb">self</span><span class="p">.</span><span class="nf">next</span> <span class="k">rescue</span> <span class="n">topics</span> <span class="p">(</span><span class="n">url</span><span class="p">.</span><span class="nf">sub!</span><span class="p">(</span><span class="sr">/\d+\.html/</span><span class="p">)</span> <span class="p">{</span><span class="o">|</span><span class="n">m</span><span class="o">|</span><span class="s2">"</span><span class="si">#{</span><span class="n">m</span><span class="p">.</span><span class="nf">to_i</span> <span class="o">+</span> <span class="mi">1</span><span class="si">}</span><span class="s2">.html"</span> <span class="p">})</span> <span class="k">end</span> <span class="k">end</span> <span class="n">list</span> <span class="k">end</span> </code></pre> <p>想把 topics(即他的返回值) 做成一个迭代器，他的内容是抓取的网页上所有 a.xst 的链接 可以一直这样调用</p> <pre class="highlight ruby"><code><span class="n">topics</span><span class="p">.</span><span class="nf">next</span> </code></pre> <p>当所有的元素迭代完之后递归一下，参数里面表示页码的部分加一比如第二次 <code>http://bbs.gfan.com/forum-274-2.html</code> 但是我写的不好，而且有错误不能运行</p> valentine Sun, 27 Jan 2013 20:44:16 +0800 https://ruby-china.org/topics/8409 https://ruby-china.org/topics/8409 <p>hi，请问有没有现成的这样的函数？</p> <p>比如说我需要多长的一段，3 厘米这样的。 如果是英文就字符多一点，中文就要少一点。</p> valentine Tue, 28 Aug 2012 16:47:18 +0800 https://ruby-china.org/topics/5207 https://ruby-china.org/topics/5207 <p>两个 model 都用了 to 这个字段，插入，查询都正常，但是用 to 排序的时候就会出现错误</p> <pre class="highlight plaintext"><code>SQLite3::SQLException: near "to": syntax error: SELECT "sales_contracts".* FROM "sales_contracts" ORDER BY sales_contracts.to asc LIMIT 10 OFFSET 0 </code></pre> valentine Mon, 27 Aug 2012 22:11:26 +0800 https://ruby-china.org/topics/5191 https://ruby-china.org/topics/5191 <p>python 里 urllib+urllib2+cookielib 写刷贴什么的小脚本简直无敌了，但是 ruby 自带的这方面的库好像比较弱啊，求推荐好用的 gem</p> valentine Fri, 24 Aug 2012 23:34:10 +0800 https://ruby-china.org/topics/5146 https://ruby-china.org/topics/5146 <p>大概就是这个页面 但是左边的那一块和右边是分离的，不会一起滚动</p> <p><a href="http://twitter.github.com/bootstrap/examples/fluid.html#" rel="nofollow" target="_blank">http://twitter.github.com/bootstrap/examples/fluid.html#</a></p> valentine Mon, 20 Aug 2012 17:11:20 +0800 https://ruby-china.org/topics/5048 https://ruby-china.org/topics/5048