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What does {0} mean when initializing an object?
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303
What's happening here is called aggregate initialization. Here is the (abbreviated) definitio...
When is assembly faster than C?
...out floating point, they shine when it comes to precision as they give you 32 bits of precision with a predictable error (float only has 23 bit and it's harder to predict precision loss). i.e. uniform absolute precision over the entire range, instead of close-to-uniform relative precision (float).
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Overloaded method selection based on the parameter's real type
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answered Oct 15 '09 at 13:28
Michael BorgwardtMichael Borgwardt
320k7373 gold badges453453 silver badges688688 bronze badges
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Swapping column values in MySQL
...t. This method doesn't swap the values if one of them is NULL. Use method #3 that doesn't have this limitation.
UPDATE swap_test SET x=y, y=@temp WHERE (@temp:=x) IS NOT NULL;
This method was offered by Dipin in, yet again, the comments of http://beerpla.net/2009/02/17/swapping-column-values-in-mys...
Why are preprocessor macros evil and what are the alternatives?
...ly becomes completely the wrong thing....
Replacement: real functions.
3) Macros have no namespace
If we have a macro:
#define begin() x = 0
and we have some code in C++ that uses begin:
std::vector<int> v;
... stuff is loaded into v ...
for (std::vector<int>::iterator it = m...
error C2662: “Screen::move”: 不能将“this”指针从“const Screen”转...
... {os<<contents;}
//main中处理
int main()
{
Screen myScreen(5,3);
const Screen blank(5,3);
//调用非const版本display
myScreen.display(cout).set('#').display(cout);
cout << endl;
//调用 const版本display
blank.display(cout);
return 0;
}
这...
Array Size (Length) in C#
... is a rectangular multi-dimensional array (for example, int[,] b = new int[3, 5];)
b.Rank
will give the number of dimensions (2) and
b.GetLength(dimensionIndex)
will get the length of any given dimension (0-based indexing for the dimensions - so b.GetLength(0) is 3 and b.GetLength(1) is 5).
S...
How do I run a Python script from C#?
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edited Jul 31 '13 at 6:31
uldall
2,2591414 silver badges2929 bronze badges
answered Aug 2...
How to run a hello.js file in Node.js on windows?
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376
Here are the exact steps I just took to run the "Hello World" example found at http://nodejs.o...
How to force LINQ Sum() to return 0 while source collection is empty
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398
Try changing your query to this:
db.Leads.Where(l => l.Date.Day == date.Day
&a...