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MySQL “NOT IN” query
...s not seem to depend on data distribution, number of values in both tables etc., as long as both fields are indexed. Since there are three pieces of code in MySQL that essentialy do one job, it is possible that the code responsible for EXISTS makes some kind of an extra check which takes extra time....
Is Javascript a Functional Programming Language?
...utability, algebraic
data types, pattern matching, partial
application etc then no, JavaScript
*is not* a functional language.
I'd encourage you to read the
following related blog posts (and also
the comments below them):
Scala is not a functional language
Erlang is...
What is the difference between “pom” type dependency with scope “import” and without “import”?
...f your POM (and all of its child POMs) without having to include a version etc.
However if in your POM you simply define a normal dependency to other-pom-artifact-id then all dependencies from the dependency section of the other-pom-artifact-id are included transitively in your project - however th...
How to check certificate name and alias in keystore files?
...n("alias name: " + alias);
Certificate certificate = keystore.getCertificate(alias);
System.out.println(certificate.toString());
}
} catch (java.security.cert.CertificateException e) {
e.printStackTrace();
} catch (NoSuchAlgorithmException e) {
...
What's the difference between HEAD^ and HEAD~ in Git?
... the parent of the commit (~~ and ^^ both refer to the grandparent commit, etc.) But they differ in meaning when they are used with numbers:
~2 means up two levels in the hierarchy, via the first parent if a commit has more than one parent
^2 means the second parent where a commit has more than on...
Object.watch() for all browsers?
...him for this a while ago. It works in IE8, Safari, Chrome, Firefox, Opera, etc.
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建站无忧--人人都是站长 - 专题 - 清泛网 - 专注IT技能提升
互联网淘金，打造属于自己的站点。本专题主要介绍域名相关、程序选择、环境配置、运维空间等站点建设方面的详细过程，让每个有想法的人都能快速、轻松建立自己的站点，开启运营之路。
std::vector排序 - C/C++ - 清泛网 - 专注C/C++及内核技术
...：
bool SortByM1( const Test &v1, const Test &v2) //注意：本函数的参数的类型一定要与vector中元素的类型一致
{
return v1.member1 < v2.member1;//升序排列
}
....
std::sort(vecTest.begin(), vecTest.end(), SortByM1)vector 排序
C++程序结果出现1.#inf 1.#IO - C/C++ - 清泛网 - 专注C/C++及内核技术
...点数越界了（超过FLT_MAX最大值了），1.#IO是%lf格式化出来的字符串。极可能原因：除0了，也就是f1 = f2 0。做任何除法...表象原因：浮点数越界了（超过FLT_MAX最大值了），1.#IO是 %lf 格式化出来的字符串。
极可能原因：除0了，...
mfc spin control 用法 - C/C++ - 清泛网 - 专注C/C++及内核技术
...if(pNMUpDown->iDelta == 1) // 如果此值为1 , 说明点击了Spin的往下箭头
{...
}
else if(pNMUpDown->iDelta == -1) // 如果此值为-1 , 说明点击了Spin的往上箭头
{...
}
*pResult = 0;
}
简便的方法可以在资源...