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When to use NSInteger vs. int
... possible integer type, which on 32 bit systems is just an int, while on a 64-bit system it's a long.
I'd stick with using NSInteger instead of int/long unless you specifically require them.
NSInteger/NSUInteger are defined as *dynamic typedef*s to one of these types, and they are defined like th...
What is the difference between int, Int16, Int32 and Int64?
...he difference between int , System.Int16 , System.Int32 and System.Int64 other than their sizes?
10 Answers
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在线服务的黑天鹅 - 资讯 - 清泛网 - 专注C/C++及内核技术
...的原因分析之后，已经4小时之后了。
“墨菲定律”，一位工程师说，“前几天觉得这个地方有些隐患，已经存在一段时间了，打算下周来处理，未料它今天就出了问题……”。墨菲定律是指“凡是可能出错的事必定会出错”，...
大数据能否拯救中国足球？ - 资讯 - 清泛网 - 专注C/C++及内核技术
...要的。现代足球利用摄像头、传感器对球员的跑动速度、位置、控球时间、防御范围、动作细节计算出大量数据，可以评估出比赛的状况，以及每名球员的防守范围，对方球队的空当区等有效信息。通过这些信息，教练员可以更...
How to track down a “double free or corruption” error
...{
char *x = malloc(100);
free(x);
free(x);
return 0;
}
[sand@PS-CNTOS-64-S11 testbox]$ vim t1.c
[sand@PS-CNTOS-64-S11 testbox]$ cc -g t1.c -o t1
[sand@PS-CNTOS-64-S11 testbox]$ ./t1
*** glibc detected *** ./t1: double free or corruption (top): 0x00000000058f7010 ***
======= Backtrace: =========...
How to compile a 64-bit application using Visual C++ 2010 Express?
Is there a simple way to compile a 64 bit app with the 32-bit edition of Visual C++ 2010 Express? What configurations, if any, are necessary?
...
Binary Data in JSON String. Something better than Base64
... bytes as five characters. However, this is only a 7% improvement over base64, it's more expensive to compute, and implementations are less common than for base64 so it's probably not a win.
You could also simply map every input byte to the corresponding character in U+0000-U+00FF, then do the mini...
How to print the ld(linker) search path
...he grep gets the directories. On my machine, this line prints out
/usr/lib64/atlas:
/usr/lib/llvm:
/usr/lib64/llvm:
/usr/lib64/mysql:
/usr/lib64/nvidia:
/usr/lib64/tracker-0.12:
/usr/lib/wine:
/usr/lib64/wine:
/usr/lib64/xulrunner-2:
/lib:
/lib64:
/usr/lib:
/usr/lib64:
/usr/lib64/nvidia/tls: (hwcap...
How to maintain aspect ratio using HTML IMG tag
...hoto in our application. I have set both its height and width attribute to 64. I need to show any image resolution (e.g. 256x256, 1024x768, 500x400, 205x246, etc.) as 64x64. But by setting the height and width attributes of an img tag to 64, it's not maintaining the aspect ratio, so the image looks ...
Should I use Python 32bit or Python 64bit
I have a win7 64bit installation. Must I use Python 64bit? What are the differences between the 32bit and 64bit Python versions anyway? Do different Python packages (such as south, django, mysqldb etc) support only 32bit/64bit?
...