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Regular cast vs. static_cast vs. dynamic_cast [duplicate]
...uld be unnecessary. Example:
void func(void *data) {
// Conversion from MyClass* -> void* is implicit
MyClass *c = static_cast<MyClass*>(data);
...
}
int main() {
MyClass c;
start_thread(&func, &c) // func(&c) will be called
.join();
}
In this example, you k...
File input 'accept' attribute - is it useful?
...is answer is good. Remember to include the "STOP" character, '.'. That was my issue.
– fungusanthrax
Dec 12 '17 at 19:45
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Unknown file type MIME?
...ation/unknown is working great, octet-stream results an error in chrome at my sample png-file!
– fnkr
May 12 '13 at 13:34
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How does C compute sin() and other math functions?
...
OK kiddies, time for the pros....
This is one of my biggest complaints with inexperienced software engineers. They come in calculating transcendental functions from scratch (using Taylor's series) as if nobody had ever done these calculations before in their lives. Not true...
Is it safe to get values from a java.util.HashMap from multiple threads (no modification)?
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Jeremy Manson, the god when it comes to the Java Memory Model, has a three part blog on this topic - because in essence you are asking the question "Is it safe to access an immutable HashMap" - the answer to that is yes. But you...
How to use Boost in Visual Studio 2010
...ORS% as an argument it will use all your cores. Makes things super fast on my quad core.
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What makes a keychain item unique (in iOS)?
My question concerns keychains in iOS (iPhone, iPad, ...). I think (but am not sure) that the implementation of keychains under Mac OS X raises the same question with the same answer.
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Is ASCII code 7-bit or 8-bit?
My teacher told me ASCII is 8-bit character coding scheme. But it is defined only for 0-127 codes which means it can be fit into 7-bits. So can't it be argued that ASCII bit is actually 7-bit code?
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What is the logic behind the “using” keyword in C++?
....
First let’s consider a toy example:
template <typename T>
class MyAlloc {/*...*/};
template <typename T, class A>
class MyVector {/*...*/};
template <typename T>
struct Vec {
typedef MyVector<T, MyAlloc<T> > type;
};
Vec<int>::type p; // sample usage
The ...
When and why will a compiler initialise memory to 0xCD, 0xDD, etc. on malloc/free/new/delete?
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My guess is that it's used to check if you forget to terminate your strings properly too (since those 0xCD's or 0xDD's are printed).
– strager
Dec 16 '08 at 0:59
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