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AtomicInteger lazySet vs. set
...re: http://psy-lob-saw.blogspot.co.uk/2012/12/atomiclazyset-is-performance-win-for.html
To summarize: lazySet is a weak volatile write in the sense that it acts as a store-store and not a store-load fence. This boils down to lazySet being JIT compiled to a MOV instruction that cannot be re-ordered ...
一分钟明白 VS manifest 原理 - C/C++ - 清泛网 - 专注C/C++及内核技术
...ifest文件
一台pc上，用一组建往往会有不止一个版本（c:/windows/winsxs或系统目录下），程序在加载的时候，不知加载哪个，于是manifest文件来指明。
manifest在哪儿，如何创建。
如果用VS开发，可以Set通过porperty->configuration propertie...
When to use enumerateObjectsUsingBlock vs. for
...mes down to personal preference. For me, the idiomatic and readable option wins. In this case, that is Fast Enumeration using for-in.
Benchmark:
NSMutableArray *arr = [NSMutableArray array];
for (int i = 0; i < 100; i++) {
arr[i] = [NSString stringWithFormat:@"%d", i];
}
int i;
__block NSUI...
Programmer Puzzle: Encoding a chess board state throughout a game
...s “all subsequent legal moves”. The problem also says nothing about knowing the moves up to this point. That’s actually a problem as I’ll explain.
Castling
The game has proceeded as follows:
e4 e5
Nf3 Nc6
Bb5 a6
Ba4 Bc5
The board looks as follows:
White has the option of castling...
Mercurial error: abort no username supplied
Problem on WindowsXP (likely will happen on all Win installs), first time using Mercurial. I found the answer in an inobvious place so I'm asking/answering the question myself so others don't have to search like I did.
...
OpenSSL and error in reading openssl.conf file
I am running windows xp 32bit
16 Answers
16
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How to determine whether a given Linux is 32 bit or 64 bit?
...e -m. Which is short of uname --machine and it outputs:
x86_64 ==> 64-bit kernel
i686 ==> 32-bit kernel
Otherwise, not for the Linux kernel, but for the CPU, you type:
cat /proc/cpuinfo
or:
grep flags /proc/cpuinfo
Under "flags" parameter, you will see various values: see "What d...
Is there a perfect algorithm for chess? [closed]
...
Scripted to win is one thing. Exhaustively enumerated is a different thing. Either way, the information is perfect -- everything is known -- the game is deterministic by definition.
– S.Lott
Jan 3...
How do I properly clean up Excel interop objects?
...sing the Excel interop in C# ( ApplicationClass ) and have placed the following code in my finally clause:
41 Answers
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PHP script - detect whether running under linux or Windows?
I have a PHP script that may be placed on a windows system or a linux system. I need to run different commands in either case.
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