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Swift Beta performance: sorting arrays
...rn abs_to_nanos(abs) / (double)NANOS_PER_SEC;
}
Here is a summary of the compiler's optimazation levels:
[-Onone] no optimizations, the default for debug.
[-O] perform optimizations, the default for release.
[-Ofast] perform optimizations and disable runtime overflow checks and runtime type c...
Create folder with batch but only if it doesn't already exist
... and is a directory. If it is not there, or is there as a file, the mkdir command will run, and should cause an error. You might want to check for whether VTS exists as a file as well.
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Checking if a double (or float) is NaN in C++
...point value
Return value
true if arg is NaN, false otherwise
Reference
http://en.cppreference.com/w/cpp/numeric/math/isnan
Please note that this is incompatible with -fast-math if you use g++, see below for other suggestions.
Other solutions: if you using non C++11 compliant tools
For C99, ...
Solving “The ObjectContext instance has been disposed and can no longer be used for operations that
... the work at hand. In the case of ASP.NET, a unit of work is typically the HTTP request being handled.
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What is a web service endpoint?
Let's say my web service is located at http://localhost:8080/foo/mywebservice and my WSDL is at http://localhost:8080/foo/mywebservice?wsdl .
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Is there a way to detect if an image is blurry?
I was wondering if there is a way to determine if an image is blurry or not by analyzing the image data.
12 Answers
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通过 ulimit 改善系统性能 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...统的内键功能，它具有一套参数集，用于为由它生成的 shell 进程及其子进程的资源使用设置限制。本文将在后面的章节中详细说明 ulimit 的功能，使用以及它的影响，并以具体的例子来详细地阐述它在限制资源使用方面的影响。...
Functional style of Java 8's Optional.ifPresent and if-not-Present?
In Java 8, I want to do something to an Optional object if it is present, and do another thing if it is not present.
12 A...
Remove duplicate entries using a Bash script [duplicate]
I want to remove duplicate entries from a text file, e.g:
4 Answers
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c++ 写日志通用类，可设置日志级别 - C/C++ - 清泛网 - 专注C/C++及内核技术
...+ 写日志通用类，可设置日志级别c++ 写日志通用类（windows & linux 通用），可设置日志级别。代码经过较长时间的测试，可用性高。Logger.h
#ifndef __LOGGER_H_
#define __LOGGER_H_
#include <iostream>
#include <atlstr.h>
#pragma warning(disable:4996)
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