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How to write a large buffer into a binary file in C++, fast?
... fwrite(a, 1, size*sizeof(unsigned long long), pFile);
}
fclose(pFile);
return 0;
}
I just timed 8GB in 36sec, which is about 220MB/s and I think that maxes out my SSD. Also worth to note, the code in the question used one core 100%, whereas this code only uses 2-5%.
Thanks a l...
Is JavaScript guaranteed to be single-threaded?
...e question of whether browsers really implement their JS engines using one OS-thread, or whether other limited threads-of-execution are introduced by WebWorkers.)
However, in reality this isn't quite true, in sneaky nasty ways.
The most common case is immediate events. Browsers will fire these rig...
Changing the color of an hr element
...or' works fine in IE; 'color' does not (IE11)
– taiji123
Jun 13 '18 at 22:22
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Printing leading 0's in C?
...intf allows various formatting options.
ex:
printf("leading zeros %05d", 123);
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Is there a way to cache GitHub credentials for pushing commits?
I recently switched to synchronizing my repositories to https:// on GitHub (due to firewall issues), and it asks for a password every time.
...
Java NIO FileChannel versus FileOutputstream performance / usefulness
...leChannel.transferFrom(). The key advantage here is that the JVM uses the OS's access to DMA (Direct Memory Access), if present. (This is implementation dependent, but modern Sun and IBM versions on general purpose CPUs are good to go.) What happens is the data goes straight to/from disc, to the b...
实时开发、测试和调试工具 · App Inventor 2 中文网
... 隐私策略和使用条款 技术支持 service@fun123.cn
Format a Go string without printing?
...te: you may also display the result of a template execution if you provide os.Stdout as the target (which also implements io.Writer):
t := template.Must(template.New("email").Parse(emailTmpl))
if err := t.Execute(os.Stdout, data); err != nil {
panic(err)
}
This will write the result directly ...
Change IPython/Jupyter notebook working directory
...
Confirmed this does work on Mac OSX, for jupyterlab 0.31.5 / IPython 6.2.1
– Brad Solomon
Feb 11 '18 at 16:48
9
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Detecting iOS / Android Operating system
...* Determine the mobile operating system.
* This function returns one of 'iOS', 'Android', 'Windows Phone', or 'unknown'.
*
* @returns {String}
*/
function getMobileOperatingSystem() {
var userAgent = navigator.userAgent || navigator.vendor || window.opera;
// Windows Phone must come fir...