大约有 15,000 项符合查询结果（耗时：0.0227秒） [XML]
How do I choose between Semaphore and SemaphoreSlim?
...because it uses a spin wait. This is more responsive, but eats up a lot of CPU and would be wasteful for longer wait periods where instantaneous responses are less important. Semaphore blocks the thread instead.
– r2_118
Jan 4 '16 at 22:34
...
How do you add a timer to a C# console application
...for (; ; )
{
// add a sleep for 100 mSec to reduce CPU usage
Thread.Sleep(100);
}
}
}
And here is the resulting output:
c:\temp>timer.exe
Creating timer: 5:22:40
Tick: 5:22:40
Tick: 5:22:41
Tick: 5:22:42
Tick: 5:2...
Check synchronously if file/directory exists in Node.js
...ynchronous version of stat; lstatSync is the synchronous version of lstat, etc.
lstatSync tells you both whether something exists, and if so, whether it's a file or a directory (or in some file systems, a symbolic link, block device, character device, etc.), e.g. if you need to know if it exists an...
Is there any difference between GROUP BY and DISTINCT
....
Here are the most important operations:
FROM (including JOIN, APPLY, etc.)
WHERE
GROUP BY (can remove duplicates)
Aggregations
HAVING
Window functions
SELECT
DISTINCT (can remove duplicates)
UNION, INTERSECT, EXCEPT (can remove duplicates)
ORDER BY
OFFSET
LIMIT
As you can see, the logical or...
程序员羊皮卷下载版.pdf - 文档下载 - 清泛网 - 专注C/C++及内核技术
...救世主
20 第2 章 四招找到好工作
20 求职中的心理健康问题
20 大专生求职受歧视
21 这世界并不亏欠我们什么
23 求职中的正确态度
24 面试前充分准备
24 专注于真正的机会
25 五个步骤查实公司信息
26 筛选重点应聘目标
27 ...
Formatting numbers (decimal places, thousands separators, etc) with CSS
...with CSS?
That is: decimal places, decimal separator, thousands separator, etc.
10 Answers
...
Compiling with g++ using multiple cores
...ge projects quicker (for example 4 source files at a time for a multi-core CPU)?
8 Answers
...
创业测试：50个迹象表明你真该创业了 - 资讯 - 清泛网 - 专注C/C++及内核技术
...个很吓人的过程，需要大量辛勤的劳作。但是是否创业这问题日夜都在困扰着你。至于原因，或许你仅仅是不满足于自己的现状;或许你是渴望开一家属于自己的店铺或是咨询公司;再或者只是你觉得你的生活需要一个显著的变化...
CMake使用教程 - C/C++ - 清泛网 - 专注C/C++及内核技术
...ctions/CMakeFiles/MathFunctions.dir/all] Error 2
make: *** [all] Error 2
问题分析：
首先看build/makefile文件，关于MakeTable有如下规则：
# Build rule for target.
MakeTable: cmake_check_build_system
$(MAKE) -f CMakeFiles/Makefile2 MakeTable
.PHONY : MakeTable
再看Makefile2...
What is the most effective way for float and double comparison?
...types.h doesn't compile on Windows, we cannot use
// uint32, uint64, and etc here.
typedef int Int;
typedef unsigned int UInt;
};
// The specialization for size 8.
template <>
class TypeWithSize<8> {
public:
#if GTEST_OS_WINDOWS
typedef __int64 Int;
typedef unsigned __int64 U...