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How do you calculate log base 2 in Java for integers?
...teger.numberOfLeadingZeros() (20-30%) and almost 10 times faster (jdk 1.6 x64) than a Math.log() based implementation like this one:
private static final double log2div = 1.000000000001 / Math.log( 2 );
public static int log2fp0( int bits )
{
if( bits == 0 )
return 0; // or throw except...
How to upgrade Git on Windows to the latest version?
...installer from https://git-scm.com/download (check whether you want 32- or 64-bit) and run it to upgrade.
If you already have the latest version it does nothing, in which case you can manually run the installer to reinstall.
C:\> git update-git-for-windows
Git for Windows 2.17.0.windows.1 (64bi...
iOS 7 status bar back to iOS 6 default style in iPhone app?
...roller will alter the height of its UINavigationBar to either 44 points or 64 points, depending on a rather strange and undocumented set of constraints. If the UINavigationController detects that the top of its view’s frame is visually contiguous with its UIWindow’s top, then it draws its naviga...
App Inventor 2 FTP 客户端拓展：FTP协议连接、上传、下载、创建、修改目录...
...位于该路径中，则只需输入文件名称即可。目标路径可以是: /mnt/sdcard/my_file.txt。操作完成后会触发 DownloadFileFinished 事件。
UploadFile(srcFilePath,desFileName)
上传文件。例如：/public_html/my_directory/my_file.txt。如果位于该路径中，则只...
Python: Convert timedelta to int in a dataframe
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Why does typeof NaN return 'number'?
...9: Number value
primitive value corresponding to a double-precision 64-bit binary format IEEE 754 value.
ECMA 262 5e Section 4.3.23: NaN
Number value that is a IEEE 754 "Not-a-Number" value.
IEEE 754 on Wikipedia
The IEEE Standard for Floating-Point Arithmetic is a ...
TortoiseSVN icons not showing up under Windows 7
...and then back on, and the Tortise overlay icons reappeared. I'm using the 64-bit version of both Win7 and TortiseSVN.
– Chris Staley
Aug 30 '09 at 1:20
96
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Realistic usage of the C99 'restrict' keyword?
... *b
add R2 += R1
set R2 → *b
Does GCC really do it?
GCC 4.8 Linux x86-64:
gcc -g -std=c99 -O0 -c main.c
objdump -S main.o
With -O0, they are the same.
With -O3:
void f(int *a, int *b, int *x) {
*a += *x;
0: 8b 02 mov (%rdx),%eax
2: 01 07 add ...
Fastest sort of fixed length 6 int array
...tainly the best answer. I will check if it also is (and how much) in golf x64 context and publish result.
– kriss
May 7 '10 at 12:06
1
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How to switch to the new browser window, which opens after click on the button?
...Security → Untick Enable Enhanced Protected Mode
Code:
Browser: IE11 x64 (Zoom: 100%)
OS: Windows 7 x64
Selenium: 3.5.1
WebDriver: IEDriverServer x64 3.5.1
public static String openWindow(WebDriver driver, By by) throws IOException {
String parentHandle = driver.getWindowHandle(); // Save pare...