Decision Tree Basic Knowledge

Logistic Regresion Basic Knowledge

Extension methods are defined as static methods but are called by using instance method syntax. Their first parameter specifies which type the method operates on, and the parameter is preceded by the this modifier. Extension methods are only in scope when you explicitly import the namespace into your source code ...

• sudo apt-get install build-essential
- This command is to install essential tools for building codes
• sudo apt-get install ruby 
- This command is to install ruby
• sudo apt-get install ruby-dev 
- This command is to install ruby dev, which can solve "`ERROR: Failed to build gem native extension"`
• `sudo apt-get install rdoc`
- `This ...

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Html Agility Pack是C#语言下一个非常实用的html解析库（官方网址：http://htmlagilitypack.codeplex.com/）。以下Html Agility Pack的使用实例：

1.准备以下文件：\       python.exe(python安装目录下)\       python27.dll(python安装目录下或System32目录下)\       DLLs目录(python安装目录下)\       libs目录(python安装目录下)\       Lib.zip(python安装目录下的Lib目录，将其打包为zip文件，可以减少文件数目)\       main.py(需要运行的文件)\ 2.创建run.bat文件\ ---------------------------------------------------------------------\      set PYTHONPATH=".;.\Lib.zip;.\DLLs;.\libs"\      .\python.exe main.py %*\ ---------------------------------------------------------------------\ 3.使用run.bat就可以直接运行main.py文件，并可以传递参数。

解决方法：\ 1.查看远程桌面连接本地客户端中“Options（选项） => Local Resource（本地资源） => Remote audio（远程音频） => Play on this computer（在当前电脑播放）"是否被选中。\ 2.查看windows server 2012是否开启windows audio service. 可以直接在搜索框中搜索service，打开service管理界面并找到windows audio服务，确认服务是否开启。

链接地址：\ http://martinvalasek.com/blog/pictures-from-a-developers-life