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Is null reference possible?
...ich may not be possible to do. Consider this simple function inside a file converter.cpp:
int& toReference(int* pointer) {
return *pointer;
}
When the compiler sees this function, it does not know whether the pointer is a null pointer or not. So it just generates code that turns any pointer...
Java integer to byte array
...nificant 8 bytes. It also avoids dragging the input number's sign into the converted octet.
– Carl Smotricz
May 30 '14 at 13:42
...
What is the difference between char array and char pointer in C?
...s provided where one of type char* is expected, the compiler automatically converts the array into a pointer to its first element.
Your example function printSomething expects a pointer, so if you try to pass an array to it like this:
char s[10] = "hello";
printSomething(s);
The compiler pretend...
dynamic_cast and static_cast in C++
... a class Base of which there is a derived class Derived, dynamic_cast will convert a Base pointer to a Derived pointer if and only if the actual object pointed at is in fact a Derived object.
class Base { virtual ~Base() {} };
class Derived : public Base {};
class Derived2 : public Base {};
class R...
Pass array to mvc Action via AJAX
... you just need to stringify your values. The JSONValueProvider in MVC will convert that back into an IEnumerable for you.
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How should I print types like off_t and size_t?
...ee that ssize_t has the same size as size_t, so truly portable code should convert it to intmax_t and print with %jd just like off_t.
– nwellnhof
Sep 30 '17 at 15:11
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Listing all permutations of a string/integer
...
Here I have found the solution. It was written in Java, but I have converted it to C#. I hope it will help you.
Here's the code in C#:
static void Main(string[] args)
{
string str = "ABC";
char[] charArry = str.ToCharArray();
Permute(charArry, 0, 2);
Console.ReadKey();
}
st...
What is the point of a private pure virtual function?
...e);
would call void SetState( int var, int val ) from the derived class, converting true to int.
If the interface is not virtual and the virtual implementation is non-public, like in your exmaple, the author of the derived class has one less problem to think about and can simply write
class MyTu...
Testing whether a value is odd or even
... numbers are floats in JavaScript and using a bitwise operator means first converting it into an int, then performing the operation, and then converting it back to a floating point number.
– poke
Sep 25 '17 at 11:25
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Determine if map contains a value for a key?
... the map for a keyvalue that is '2'. IIRC the C++ compiler will implicitly convert '2' to an int, which results in the numeric value for the ASCII code for '2' which is not what you want.
Since your keytype in this example is int you want to search like this: m.find(2);
...