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微软VS苹果 桌面操作系统的终极一战 - 创意 - 清泛网 - 专注C/C++及内核技术
...桌面操作系统的终极一战苹果将在九月份推出正式版的OS m>X m> El Capitan。虽然对于苹果来说，这看上去只是每年一次的例行升级，不过结合微软在7月底的大动作，今年的桌面操作系统大战，很有可能是这两家巨头厂商对于抢夺用户...
What makes Lisp macros so special?
...of using Lisp macros. As someone who wants to understand the buzz, please em>x m>plain what makes this feature so powerful.
14 A...
MIN and MAm>X m> in C
Where are MIN and MAm>X m> defined in C, if at all?
14 Answers
14
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What is a message pump?
... (I've been programming in C# for only about a year; my other programming em>x m>perience has primarily been with ColdFusion.)
6...
What is a race condition?
When writing multithreaded applications, one of the most common problems em>x m>perienced is race conditions.
18 Answers
...
How to calculate a logistic sigmoid function in Python?
...
This should do it:
import math
def sigmoid(m>x m>):
return 1 / (1 + math.em>x m>p(-m>x m>))
And now you can test it by calling:
>>> sigmoid(0.458)
0.61253961344091512
Update: Note that the above was mainly intended as a straight one-to-one translation of the given em>x m>...
What does the construct m>x m> = m>x m> || y mean?
I am debugging some JavaScript, and can't em>x m>plain what this || does?
12 Answers
12
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EJB's - when to use Remote and/or local interfaces?
...ocal interfaces come in? Are you supposed to use Remote interfaces if you em>x m>pect your application to have different components on different servers? And use Local interfaces if your application is only going to reside on one server?
...
How do I em>x m>pand a tuple into variadic template function's arguments?
... )
{
try
{
applyTuple( pObj_, pFunc_, args_ );
}
catch ( std::em>x m>ception& e )
{
}
}
share
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improve this answer
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follow
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Using Default Arguments in a Function
... declaration as follows so you can do what you want:
function foo($blah, $m>x m> = null, $y = null) {
if (null === $m>x m>) {
$m>x m> = "some value";
}
if (null === $y) {
$y = "some other value";
}
code here!
}
This way, you can make a call like foo('blah', null, 'non-defa...