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MySQL - why not index every field?
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123
Indexes take up space in memory (RAM); Too many or too large of indexes and the DB is going to ...
Remove data.frame row names when using xtable
...; print(xtable(res), include.rownames=FALSE)
% latex table generated in R 2.12.2 by xtable 1.5-6 package
% Fri Mar 25 10:06:08 2011
\begin{table}[ht]
\begin{center}
\begin{tabular}{rrrrr}
\hline
am & cyl & mpg & hp & wt \\
\hline
0.00 & 4.00 & 22.90 & 84.67 & 2....
How to close current tab in a browser window?
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520
You will need Javascript to do this. Use window.close():
close();
Note: the current tab is i...
Make anchor link go some pixels above where it's linked to
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21 Answers
21
Active
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addEventListener vs onclick
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1002
Both are correct, but none of them are "best" per se, and there may be a reason the developer ch...
Debugging WebSocket in Google Chrome
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255
Chrome developer tools now have the ability to list WebSocket frames and also inspect the data...
[精华] VC中BSTR、Char和CString类型的转换 - C/C++ - 清泛网 - 专注C/C++及内核技术
...heString = chArray;
theString.format(_T("%s"), chArray);
theString = p;
2、CString转换成char*
若将CString类转换成char*(LPSTR)类型，常常使用下列三种方法：
方法一，使用强制转换。例如：
CString theString( "This is a test" );
LPTSTR lpsz =(LPTSTR)(LPCTSTR)t...
How to add a touch event to a UIView?
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In iOS 3.2 and higher, you can use gesture recognizers. For example, this is how you would handle a tap event:
//The setup code (in viewDidLoad in your view controller)
UITapGestureRecognizer *singleFingerTap =
[[UITapGestureRecog...