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C#: Assign same value to multiple variables in single statement
...um1 = num2 = 5;
When using an object property instead of variable, it is interesting to know that the get accessor of the intermediate value is not called. Only the set accessor is invoked for all property accessed in the assignation sequence.
Take for example a class that write to the console ev...
Enum ToString with user friendly strings
...
I created a reverse extension method to convert the description back into an enum value:
public static T ToEnumValue<T>(this string enumerationDescription) where T : struct
{
var type = typeof(T);
if (!type.IsEnum)
throw new ArgumentExceptio...
What is an idiomatic way of representing enums in Go?
...declaration, the predeclared identifier iota represents successive untyped integer constants. It is reset to 0 whenever the reserved word const appears in the source and increments after each ConstSpec. It can be used to construct a set of related constants:
const ( // iota is reset to 0
...
Altering a column to be nullable
...s):
ALTER TABLE Merchant_Pending_Functions ALTER COLUMN NumberOfLocations INT NULL
Replace INT with your actual datatype.
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How can I generate random number in specific range in Android? [duplicate]
...
Random r = new Random();
int i1 = r.nextInt(80 - 65) + 65;
This gives a random integer between 65 (inclusive) and 80 (exclusive), one of 65,66,...,78,79.
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C++11 tuple 这一篇就够了 - C/C++ - 清泛网 - 专注C/C++及内核技术
...法：
#include <iostream>
#include <tuple>
#include <functional>
int main()
{
auto t1 = std::make_tuple(10, "Test", 3.14);
std::cout << "The value of t1 is "
<< "(" << std::get<0>(t1) << ", " << std::get<1>(t1)
<< ", " << std::get<2>(t1) << ")\n";
...
CMap用法 - C/C++ - 清泛网 - 专注C/C++及内核技术
...高你的效率。CMap就是对Hash表的一种实现。先上实例：
int _tmain(int argc, char* argv[])
{
//定义
typedef CMap<int, int, CString, CString> CMapInt;
CMapInt map;
//添加key，val
map.SetAt(1, "str1");
map.SetAt(2, "str2");
map.SetAt(3, "str3");
map.SetAt...
c++ boost库 序列化与反序列化 - C/C++ - 清泛网 - 专注C/C++及内核技术
...<typename Archive>void serialize(Archive& ar, TOrder & obj, const unsigned int ver...1、定义类/结构体序列化函数：
template <typename Archive>
void serialize(Archive& ar, TOrder & obj, const unsigned int version = SERIALIZATION_VERSION)
{
ar & BOOST_SERIALIZATION_NVP(obj.Pa...
register int i;的含义 - C/C++ - 清泛网 - 专注C/C++及内核技术
register int i;的含义register声明的作用是为了提高效率。它明确要求CPU把变量始终保存在寄存器里面，直至它消亡。不过现代编译器都很厉害，根本不需要你多此一...register声明的作用是为了提高效率。
它明确要求CPU把变量始终...
C/C++ 如何向上取整？ - C/C++ - 清泛网 - 专注C/C++及内核技术
...向上取整？一般地，向上取整有两种方法：#include <math.h>int _tmain(int argc, _TCHAR* argv[]){int a = 6, b = 5; ceil函数printf("%d...一般地，向上取整有两种方法：
#include <math.h>
int _tmain(int argc, _TCHAR* argv[])
{
int a = 6, b = 5;
//ceil函数
p...