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Hash function that produces short hashes?
...ay of encryption that can take a string of any length and produce a sub-10-character hash? I want to produce reasonably unique ID's but based on message contents, rather than randomly.
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Maximum length of the textual representation of an IPv6 address?
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45 characters.
You might expect an address to be
0000:0000:0000:0000:0000:0000:0000:0000
8 * 4 + 7 = 39
8 groups of 4 digits with 7 : between them.
But if you have an IPv4-mapped IPv6 address, the last two groups can b...
Code Golf: Lasers
The shortest code by character count to input a 2D representation of a board, and output 'true' or 'false' according to the input .
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Convert Elixir string to integer or float
...k String.to_integer/1 and String.to_float/1.
Hint: See also to_atom/1,to_char_list/1,to_existing_atom/1for other conversions.
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c++提取复数的实部和虚部 - C/C++ - 清泛网 - 专注C/C++及内核技术
...// 实部
REAL i; // 虚部
};
bool Parse(COMPLEX * cp, const char * strCplx, const int len)
{
memset(cp, 0, sizeof(COMPLEX));
char buf[MAX_BUF_LEN];
int signPos = -1, // +/-号位置
iPos = -1; // 结尾的i的位置
for (int i = len-1; i >-1;...
C++11 tuple 这一篇就够了 - C/C++ - 清泛网 - 专注C/C++及内核技术
...
#include <iostream>
#include <tuple>
int main ()
{
int myint;
char mychar;
float myfloat;
std::tuple<int,float,char> mytuple;
mytuple = std::make_tuple (10, 2.6, 'a'); // packing values into tuple
//std::tie (myint, std::ignore, mychar) = mytuple; // unpacking...
libcurl网络连接使用tcp/ip - C/C++ - 清泛网 - 专注C/C++及内核技术
...络连接使用tcp ip，部分代码如下：CURL *curl;CURLcode res;const char *request = "GETas.xxxxE测试发送"; curl_socket_t sockfd; * socket * ...部分代码如下：
CURL *curl;
CURLcode res;
const char *request = "GETas.xxxxE测试发送";
curl_socket_t sockfd; /* socket */
l...
c++ 写日志通用类，可设置日志级别 - C/C++ - 清泛网 - 专注C/C++及内核技术
... Log(int nLevel, LPCSTR func, INT line, LPCTSTR fmt, ...);
static const char * const LOGGER_LEVEL_NAME[] = {"崩溃", "错误", "警告", "信息", "详细", "调试"};
static const char * const LOGGER_LEVEL_CODE[] = {"FATAL", "ERROR", "WARN ", "INFO ", "VERBOSE", "DEBUG"};
#define logging(nL...
atol 头文件 - C/C++ - 清泛网 - 专注C/C++及内核技术
...数名:atol功能: 把字符串转换成长整型数用法: longatol(const char *nptr);程序例:#include <stdlib.h> #includ...#include <stdlib.h>
函数名: atol
功 能: 把字符串转换成长整型数
用 法: long atol(const char *nptr);
实例:
#include <stdlib.h>
#include <s...
C++ 通过主机名/域名获取IP - C/C++ - 清泛网 - 专注C/C++及内核技术
...中用到Winsock API 函数，都要用到 Ws2_32.lib
void GetHostIP(char *szIPAddr)
{
WSADATA wsaData;
char name[155]; //定义用于存放获得主机名的变量
char *ip; //定义IP地址变量
PHOSTENT hostinfo;
//调用MAKEWORD()获得Winsocl版本的正确值...