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How expensive is RTTI?
...pe_info in GCC's STL, as of GCC 3.0. I did find that mingw32-gcc obeys the Windows C++ ABI, where std::type_info objects aren't unique for a type across DLLs; typeid(a) == typeid(b) calls strcmp under the covers. I speculate that on single-program embedded targets like AVR, where there is no code to...
Why is transposing a matrix of 512x512 much slower than transposing a matrix of 513x513?
... same for my computer Intel Core 2 Duo with mingw gcc4.4,who's running on windows 7(32).It does show a big difference when I compile this segment with a little older pc intel centrino with gcc 4.6,who's running on ubuntu 12.04 i386.
– Hongxu Chen
Sep 27 '12 at...
Why are margin/padding percentages in CSS always calculated against width?
...te direction; so the width can be calculated from the width of the browser window. The only way elements are wider than the screen is if you specify their width to be larger. Typical block elements are width 100% and expand automatically in the vertical direction (unknown). That's why width doesn...
Turning live() into on() in jQuery
...ode
jQuery.fn.extend({
live: function( types, data, fn ) {
if( window.console && console.warn ) {
console.warn( "jQuery.live is deprecated. Use jQuery.on instead." );
}
jQuery( this.context ).on( types, this.selector, data, fn );
return t...
How do I find where an exception was thrown in C++?
...
he said gdb, which pretty much rules out Windows/Visual Studio.
– Ben Voigt
Mar 15 '10 at 14:28
2
...
Verify a certificate chain using openssl verify
...diate certificates and cat them together into a single file (on Unix). On Windows you can just open a text editor (like notepad.exe) and paste the certificates into the file, the first needed on top and following the others.
There is another thing. The files need to be in PEM format. Some CAs is...
指定组件的大小 · App Inventor 2 中文网
... 顶部 var qrcode = new QRCode("qrcode", { text: window.location.href + "?f=share", //URL地址 width: 150, height: 150, colorDark: '#000000', //二维码颜色 colorLight: "#ffffff" //背景颜色}); App Inventor 2 中文网 © 2023 - docume...
RadioButton单选按钮扩展集合 · App Inventor 2 中文网
... 顶部 var qrcode = new QRCode("qrcode", { text: window.location.href + "?f=share", //URL地址 width: 150, height: 150, colorDark: '#000000', //二维码颜色 colorLight: "#ffffff" //背景颜色}); App Inventor 2 中文网 MIT同步更新的中文本...
How can I record a Video in my Android App.?
...nstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
setRequestedOrientation(ActivityInfo.SCREEN...
Clang vs GCC - which produces faster binaries? [closed]
...built for Linux with both GCC and Clang,
and with Microsoft's compiler for Windows. The tool, coan, is a preprocessor
and analyser of C/C++ source files and codelines of such: its
computational profile majors on recursive-descent parsing and file-handling.
The development branch (to which these re...