https://ruby-china.org/michael en-us <p>closed</p> michael Sat, 31 Oct 2015 14:48:27 +0800 https://ruby-china.org/topics/27902 https://ruby-china.org/topics/27902 <p>如果没有，如何实现虚函数？有无修饰符号或说明符号提示？</p> michael Fri, 23 Oct 2015 11:59:52 +0800 https://ruby-china.org/topics/27788 https://ruby-china.org/topics/27788 <p>2013-07-15 开始 Qt5，做了两个 demo。 后来发现还是要从项目入手，选准一个行业方向，比如音视频，qt，网络编程，系统编程等</p> michael Fri, 05 Apr 2013 23:42:17 +0800 https://ruby-china.org/topics/9979 https://ruby-china.org/topics/9979 <p>安装 ruby-china，如下问题，是什么原因呢？真心求教</p> <p>=========================chromium 下，<a href="http://127.0.0.1:3000" rel="nofollow" target="_blank">http://127.0.0.1:3000</a> 输出=========== NoMethodError in Home#index</p> <p>Showing /home/administrator/work/ruby-china/app/views/home/index.html.erb where line #1 raised:</p> <p>undefined method `[]' for nil:NilClass Extracted source (around line #1):</p> <p>1: &lt;%= raw SiteConfig.index_html %&gt; 2: &lt;% content_for :styles do %&gt; 3: &lt;%= stylesheet_link_tag "home" %&gt; 4: &lt;% end %&gt; Rails.root: /home/administrator/work/ruby-china</p> <p>Application Trace | Framework Trace | Full Trace app/models/site_config.rb:48:in <code>find_by_key' app/models/site_config.rb:33:in</code>block in method_missing' app/models/site_config.rb:32:in <code>rescue in method_missing' app/models/site_config.rb:19:in</code>method_missing' app/views/home/index.html.erb:1:in `<u>app_views_home_index_html_erb</u>__746429660_108226000' Request</p> <p>Parameters:</p> <p>None Show session dump</p> <p>Show env dump</p> <p>Response</p> <p>Headers:</p> <p>None</p> michael Wed, 03 Oct 2012 01:37:28 +0800 https://ruby-china.org/topics/5857 https://ruby-china.org/topics/5857