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Array.Copy vs Buffer.BlockCopy
...Copy() can perform very poorly here due to the continual "safe" value type casting, compared to the direct casting of Buffer.BlockCopy().
Additional evidence from outside StackOverflow that Array.Copy() is faster than Buffer.BlockCopy() for same-type array copying can be found here.
...
How can one print a size_t variable portably using the printf family?
...ode into a file that's compiled as C99. Otherwise, your only option is to cast your variables to unsigned long long and use %llu to be maximally portable.
– Adam Rosenfield
Apr 13 '10 at 1:52
...
C# - Keyword usage virtual+override vs. new
...a Bar, but we are storing it in a variable of type Foo (this is similar to casting it)
Then the result will be as follows, depending on whether you used virtual/override or new when declaring your classes.
share
...
How to throw std::exceptions with variable messages?
...lt;< foo << 13 << ", bar" << myData); // implicitly cast to std::string
throw std::runtime_error(Formatter() << foo << 13 << ", bar" << myData >> Formatter::to_str); // explicitly cast to std::string
...
C++ templates Turing-complete?
...= config::position };
typedef typename Conditional<
static_cast<int>(GetSize<typename config::input>::value)
<= static_cast<int>(position),
AppendItem<InputBlank, typename config::input>,
Identity<typename config::input>&g...
Creating Unicode character from its number
...
Just cast your int to a char. You can convert that to a String using Character.toString():
String s = Character.toString((char)c);
EDIT:
Just remember that the escape sequences in Java source code (the \u bits) are in HEX, so ...
Why does ReSharper want to use 'var' for everything?
...Dictionary<int,bool>>>> q = from t in d where t.Key == null select t; // OMG!
//vs.
var q = from t in d where t.Key == null select t;
// I simply want the first string, so the last version seems fine.
q.First().Key;
You must use var when there's an anonymous ty...
Virtual/pure virtual explained
...es. What virtual does is to give you polymorphism, that is, the ability to select at run-time the most-derived override of a method.
Consider the following code:
#include <iostream>
using namespace std;
class Base {
public:
void NonVirtual() {
cout << "Base NonVirtual call...
How to get rid of `deprecated conversion from string constant to ‘char*’` warnings in GCC?
...alise strings that will be modified, because they are of type const char*. Casting away the constness to later modify them is undefined behaviour, so you have to copy your const char* strings char by char into dynamically allocated char* strings in order to modify them.
Example:
#include <iostr...
Weighted random numbers
...
if you have a bag of red and blue marbles and you select a red marble from it and don't replace it is the probability of selecting another red marble still the same? In the same way, your statement "Pick elements from the bag sequentially until it is empty" produces a totall...