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Should I use a data.frame or a matrix?
...ing via as.matrix() will result in a character matrix if any of the factor labels is non-numeric. Compare:
> head(as.matrix(data.frame(a = factor(letters), B = factor(LETTERS))))
a B
[1,] "a" "A"
[2,] "b" "B"
[3,] "c" "C"
[4,] "d" "D"
[5,] "e" "E"
[6,] "f" "F"
> head(data.matrix(data...
Options, Settings, Properties, Configuration, Preferences — when and why?
...ences are probably not things that have as large of an impact as something labeled options or settings. Things such as a minor change in the display or something similar.
The most important thing is to have consistency across the application.
And personally, I prefer the term 'options', as it so...
【精心整理】【实用】visual C++中最常用的类与API函数 - C/C++ - 清泛网 -...
...
CDocument类：提供用户定义的文档类的基本功能
CEdit类：是一个用于编辑控件的类
CFile类：该类是基本文件类的基类
CFileDialog类：封装了打开和保存文件的标准对话框
CFindReplaceDialog类：封装了标准查找/替换对话框
CFont类...
how to remove shared preference while application uninstall in android
...ccelerated="true"
android:icon="@drawable/appicon"
android:label="@string/application_name"
android:largeHeap="true"
android:theme="@style/AppTheme"
tools:replace="android:allowBackup">
<activity
android:name="com.package.SplashActiv...
CSS hack大全 - 创意 - 清泛网 - 专注C/C++及内核技术
...
Firefox
Opera
Safari(Chrome)
Opera的辨别色是深绿色，Opera游览器很时髦么。 Firefox的辨别色是浅绿色，Firefox是很强大的游览器。 Safari和Chrome的辨别色是金黄色，Safari和Chrome使用的都是Webkit内核
part2 —— CSS hack...
大单融资后，MOOC去哪儿 - 资讯 - 清泛网 - 专注C/C++及内核技术
...称，尚未找到盈利模式的MOOC之所以屡获资本青睐，更多是因为政策红利。在大额融资后，MOOC又该何去何从？
MOOC融资后的高校竞争
2013年被称为中国MOOC元年。这种大型开放式网络课程在进入国内后便在一片质疑声中戴上光环，...
PHP Function Comments
...re
* information.
*
* Summary Examples:
* + Sets the label (preferred)
* + Set the label (avoid)
* + This method sets the label (avoid)
*
* Below are the tags commonly used for methods. A @param tag is
* required for eac...
What is the difference between RDF and OWL? [closed]
...S vocabularies.
owl:ObjectProperty a rdfs:Class ;
rdfs:label "ObjectProperty" ;
rdfs:comment "The class of object properties." ;
rdfs:isDefinedBy <http://www.w3.org/2002/07/owl#> ;
rdfs:subClassOf rdf:Property .
owl:...
Make a borderless form movable?
...
If you have a label or an icon (or any other foreground objects!) where you are grabbing the form to drag, add a mousedown event to these items too. Form events can't see through form objects.
– Paul Nelson
...
Windows x64编程中寄存器的使用 - C/C++ - 清泛网 - 专注C/C++及内核技术
Windows x64编程中寄存器的使用下面是摘自 MSDN 的文章，在Win64下的 registers 用途RegisterStatusUseRAXVolatileReturn value registerRCXVolatileFirst integer 下面是摘自 MSDN 的文章，在 Win64 下的 registers 用途
Register
Status
Use
...