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How does RegexOptions.Compiled work?
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Thanks for your answer but your code is in the Python language. The question was about the Microsoft .NET framework RegexOptions.Compiled option. You can see the [ .net ] tag attached below the question.
– stomy
Aug 5 '19 at 17:38
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Exporting functions from a DLL with dllexport
...or maybe importing from another language (i.e PInvoke from .NET, or FFI in Python/R etc) you can use extern "C" inline with your dllexport to tell the C++ compiler not to mangle the names. And since we are using GetProcAddress instead of dllimport we don't need to do the ifdef dance from above, jus...
Why are const parameters not allowed in C#?
...nguage on top of the CLR should support const correctness (VB, JavaScript, Python, Ruby, F#, etc.) That's not going to happen.
Const correctness is pretty much a language feature only present in C++. So it pretty much boils down to the same argumentation as to why the CLR does not require checked ...
Fastest way to determine if an integer's square root is an integer
...* y ) ); // 2nd iteration, this can be removed
#ifndef Q3_VM
#ifdef __linux__
assert( !isnan(y) ); // bk010122 - FPE?
#endif
#endif
return y;
}
Which basically calculates a square root, using Newton's approximation function (cant remember the exact name).
It should be usable and mi...
Is recursion a feature in and of itself?
...code itself, but rather in the code the compiler created). In Java, C, and Python, recursion is fairly expensive compared to iteration (in general) because it requires the allocation of a new stack frame. Not to mention you can get a stack overflow exception if the input is not valid too many times....
My attempt at value initialization is interpreted as a function declaration, and why doesn't A a(())
..., because () doesn't mean anything (and even if did, like empty tuple (see Python), it would be one argument, not zero). Practically that means you cannot use shorthand syntax without using C++11's {} syntax, as there are no expressions to put in parenthesis, and C grammar for function declarations ...
Differences between Perl and PHP [closed]
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Perl is used plenty for websites, no less than Python and Ruby for example. That said, PHP is used way more often than any of those. I think the most important factors in that are PHP's ease of deployment and the ease to start with it.
The differences in syntax are too m...
企业级负载平衡简介 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...后要提到的就是L3/4负载平衡服务器的一个软件实现LVS（Linux Virtual Server）。相较于硬件实现，软件实现需要做很多额外的工作，例如对数据包的解码，为处理数据包分配内存等等呢个。因此其性能常常只是具有相同硬件能力的L3/...
What's the purpose of using braces (i.e. {}) for a single-line if or loop?
... ; ++i)
if (i % 2 == 0)
j++;
i++;
Oh no! Coming from Python, this looks ok, but in fact it isn't, as it's equivalent to:
int j = 0;
for (int i = 0 ; i < 100 ; ++i)
if (i % 2 == 0)
j++;
i++;
Of course, this is a silly mistake, but one that even an experienced p...
Is quitting an application frowned upon?
... you have to imagine that you don't have the luxury of delegating tasks to Linux/Windows boxes. You have to imagine that you are forced to do everything from the frontmostend to the backmostend with only boxes that run the "Android model". Then, you'll see that the limitations of the "Android model"...