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Is there a performance difference between i++ and ++i in C++?
...for ++i
{
this->data += 1;
return *this;
}
Foo Foo::operator++(int ignored_dummy_value) // called for i++
{
Foo tmp(*this); // variable "tmp" cannot be optimized away by the compiler
++(*this);
return tmp;
}
Since the compiler isn't generating code, but just calling an ...
Getting image dimensions without reading the entire file
...static Size GetDimensions(BinaryReader binaryReader)
{
int maxMagicBytesLength = imageFormatDecoders.Keys.OrderByDescending(x => x.Length).First().Length;
byte[] magicBytes = new byte[maxMagicBytesLength];
for (int i = 0; i < maxMagicBytesLength; i...
C++形参与实参的区别（实例解析） - C/C++ - 清泛网 - 专注C/C++及内核技术
...，而实参中的值不会变化。
参考如下示例：
void Exchg1(int x, int y)
{
int tmp;
tmp=x;
x=y;
y=tmp;
printf("Exchg1:x=%d,y=%d\n",x,y);
}
void Exchg2(int &x, int &y)
{
int tmp;
tmp=x;
x=y;
y=tmp;
printf("Exchg2:x=%d,y=%d\n",x,y);
}
void Exchg3(int *x, int...
获取控件的值的几种方法总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
...总结最简单直观的：CString str;GetDlgItemText(IDC_EDIT_TEST, str);int d=atoi(str.GetBuffer(0));更优雅的：.h：int m_editTest;.cpp：v...最简单直观的：
CString str;
GetDlgItemText(IDC_EDIT_TEST, str);
int d=atoi(str.GetBuffer(0));
更优雅的：
.h：int m_editTest;
.cp...
error C2758: “ConstInit::cival”: 必须在构造函数基/成员初始值设定项列...
...：
//const成员初始化
class ConstInit {
public:
ConstInit(int i,int j)
{
ival = i;
cival = j;
rival = ival;
}
private:
int ival;
const int cival;
int &rival;
};
int main(int argc, char *argv[])
{
ConstInit ci;
}
这里引用...
c++ 经典的快速排序QuickSort完整代码片 - 开源 & Github - 清泛网 - 专注C/C++及内核技术
...原文有个bug，本文已修正代码如下： include <iostream>void printArray(int *array, int n){ for (int i = 0 c++快速排序算法实现，经典的一种写法，来自Github，原文有个bug，本文已修正代码如下：
#include <iostream>
void printArray(int *array, int n...
Must qualify the allocation with an enclosing instance of type GeoLocation
...GeoLocation outer = new GeoLocation();
Then create instance of class you intended to call, as follows:
service.submit(outer.new ThreadTask(i));
I hope this will resolve your issue;-)
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How to delete a property from Google Analytics
...
UPDATE/EDIT – December 5, 2014 : Converted this to community wiki… feel invited to edit and update.
UPDATE/EDIT – AUGUST 1, 2014
Google has done it again… they changed the design. But they also made things a bit simpler and more logic. Go to Admin...
Overriding fields or properties in subclasses
... behavior. You should remember though, that when at runtime the property MyInt is accessed, the derived class has no control on the value returned. The base class by itself is capable of returning this value.
This is how a truly polymorphic implementation of your property might look, allowing the d...
C# Sortable collection which allows duplicate keys
...TKey : IComparable
{
#region IComparer<TKey> Members
public int Compare(TKey x, TKey y)
{
int result = x.CompareTo(y);
if (result == 0)
return 1; // Handle equality as beeing greater
else
return result;
}
#endregion
}
Y...