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How to count the number of set bits in a 32-bit integer?
...ou may need to adjust it to work for a particular language (e.g. using uint32_t for C++ and >>> in Java):
int numberOfSetBits(uint32_t i)
{
// Java: use int, and use >>> instead of >>
// C or C++: use uint32_t
i = i - ((i >> 1) & 0x55555555);
i =...
Swift Beta performance: sorting arrays
... 0.045478346
C: 0.000784666
Swift_builtin: 0.032513488
As you can see, Swift's performance improved by a factor of 20.
As per mweathers' answer, setting [-Ofast] makes the real difference, resulting in these times for n=10_000:
Swift: 0.000706745
C: ...
Qt: can't find -lGL error
...
Rando Hinn
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answered Aug 29 '13 at 6:15
Sayyed Hassan AmiriSayyed Hassan Amiri
...
How to get memory available or used in C#
...
Jesper Fyhr KnudsenJesper Fyhr Knudsen
6,85322 gold badges3030 silver badges4444 bronze badges
...
Java maximum memory on Windows XP
I've always been able to allocate 1400 megabytes for Java SE running on 32-bit Windows XP (Java 1.4, 1.5 and 1.6).
13 Answe...
Failed to allocate memory: 8
..., but what worked was to launch the AVD from the command line emulator-arm.exe @AVD-NAME
Somehow if launched with only emulator.exe, I would get the same error message than when trying to launch via Eclipse.
share
...
Can functions be passed as parameters?
...
232
Yes, consider some of these examples:
package main
import "fmt"
// convert types take an int...
Does Python SciPy need BLAS?
...t be consistent for BLAS, LAPACK, NumPy, and SciPy.
## For GNU compiler on 32-bit systems:
#g77 -O2 -fno-second-underscore -c *.f # with g77
#gfortran -O2 -std=legacy -fno-second-underscore -c *.f # with gfortran
## OR for GNU compiler on 64-bit systems:
#g77 -O3 -m64 -fno-sec...
诺奖得主谈“双创”：让鼓励创业成为一种文化 - 资讯 - 清泛网 - 专注C/C++...
...中国经济变革的看法，他认为：“大众创业，万众创新”是中国经济发展的改革方向，让多元化的金融机构参与进来，才是中国经济未来的发展大势。2015年10月31日，在全球金融博物馆博览会上，诺贝尔经济学奖得主哥伦比亚大...
科大讯飞徐景明：从语音交互到人工智能 - 资讯 - 清泛网 - 专注C/C++及内核技术
...”的产业抱负，在平房里开始了艰苦的创业，有时中午只是蹲在地上随便吃盒盒饭，以至于来帮忙录音的广播电台的小姑娘说自己不像跟一群科学家在工作，反而像和民工一起……
现在看来，一切都值得。如今，刘庆峰和师兄...