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What is this crazy C++11 syntax ==> struct : bar {} foo {};?
...tandard abstract UDT (User-Defined Type):
struct foo { virtual void f() = 0; }; // normal abstract type
foo obj;
// error: cannot declare variable 'obj' to be of abstract type 'foo'
Let's also recall that we can instantiate the UDT at the same time that we define it:
struct foo { foo() { cout &l...
Move capture in lambda
...ariables can be initialized with anything like so:
auto lambda = [value = 0] mutable { return ++value; };
In C++11 this is not possible yet, but with some tricks that involve helper types. Fortunately, the Clang 3.4 compiler already implements this awesome feature. The compiler will be released D...
Reset the database (purge all), then seed a database
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280
I use rake db:reset which drops and then recreates the database and includes your seeds.rb file....
How to easily initialize a list of Tuples?
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305
c# 7.0 lets you do this:
var tupleList = new List<(int, string)>
{
(1, "cow"),...
How to calculate moving average using NumPy?
...ret[n:] - ret[:-n]
return ret[n - 1:] / n
>>> a = np.arange(20)
>>> moving_average(a)
array([ 1., 2., 3., 4., 5., 6., 7., 8., 9., 10., 11.,
12., 13., 14., 15., 16., 17., 18.])
>>> moving_average(a, n=4)
array([ 1.5, 2.5, 3.5, 4....
When is TCP option SO_LINGER (0) required?
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edited Apr 30 '15 at 11:18
OJ.
26.7k55 gold badges5252 silver badges6969 bronze badges
ans...
How to use QueryPerformanceCounter?
...
#include <windows.h>
double PCFreq = 0.0;
__int64 CounterStart = 0;
void StartCounter()
{
LARGE_INTEGER li;
if(!QueryPerformanceFrequency(&li))
cout << "QueryPerformanceFrequency failed!\n";
PCFreq = double(li.QuadPart)/1000.0;
Q...
Rsync copy directory contents but not directory itself
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answered Nov 30 '13 at 13:58
ProtostomeProtostome
4,32944 gold badges2626 silver badges4141 bronze badges
...
怎么往SetTimer的回调函数传递参数 - C/C++ - 清泛网 - 专注C/C++及内核技术
...的处理函数。
下面我们来通过一个例子说明一下，用vs2005或VC建立一个Win32工程，然后看自动生成的代码：
int APIENTRY _tWinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPTSTR lpCmdLine,
...
Setting Android Theme background color
...ally silly mistake. The device I am using for testing is running Android 4.0.4, API level 15.
The styles.xml file that I was editing is in the default values folder. I edited the styles.xml in values-v14 folder and it works all fine now.
...