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Secure random token in Node.js
..."Base 64 Encoding with URL and Filename Safe Alphabet". IMO, replacing the characters is "elegant enough".
– natevw
Oct 7 '13 at 21:58
8
...
Difference between int32, int, int32_t, int8 and int8_t
...ktop/server machines, it probably won't be.
Oops -- missed the part about char. You'd use int8_t instead of char if (and only if) you want an integer type guaranteed to be exactly 8 bits in size. If you want to store characters, you probably want to use char instead. Its size can vary (in terms of ...
memcpy() vs memmove()
...or you risk undefined behaviour, while the memory in memmove can overlap.
char a[16];
char b[16];
memcpy(a,b,16); // valid
memmove(a,b,16); // Also valid, but slower than memcpy.
memcpy(&a[0], &a[1],10); // Not valid since it overlaps.
memmove(&a[0], &a[1],10); ...
C++ display stack trace on exception
...ning "filename(function+address)",
// this array must be free()-ed
char** symbollist = backtrace_symbols(addrlist, addrlen);
// allocate string which will be filled with the demangled function name
size_t funcnamesize = 256;
char* funcname = (char*)malloc(funcnamesize);
// ...
How do I replace a character at a particular index in JavaScript?
I have a string, let's say Hello world and I need to replace the char at index 3. How can I replace a char by specifying a index?
...
ZeroMQ实例-使用ZMQ(ZeroMQ)进行局域网内网络通信 - C/C++ - 清泛网 - 专注C/C++及内核技术
...q的头文件
#include <zmq.h>
#include "stdio.h"
int main(int argc, char * argv[])
{
void * pCtx = NULL;
void * pSock = NULL;
const char * pAddr = "tcp://*:7766";
//创建context，zmq的socket 需要在context上进行创建
if((pCtx = zmq_ctx_new()) == NULL)
...
How does this print “hello world”?
...01100100100111110111111110111101100011000010101000
The program decodes a character for every 5-bits group, from right to left
00100|01100|10010|01111|10111|11111|01111|01100|01100|00101|01000
d | l | r | o | w | | o | l | l | e | h
5-bit codification
For 5 bits, it is...
Passing base64 encoded strings in URL
...ed to url-encode it, since base64 strings can contain the "+", "=" and "/" characters which could alter the meaning of your data - look like a sub-folder.
Valid base64 characters are below.
ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=
...
How to trim a string to N chars in Javascript?
...ted, i.e. it will return the string up to it's end if there are not enough characters for the given end!
– centic
Feb 11 '15 at 14:53
...
Error: free(): invalid next size (fast):
...
If you are trying to allocate space for an array of pointers, such as
char** my_array_of_strings; // or some array of pointers such as int** or even void**
then you will need to consider word size (8 bytes in a 64-bit system, 4 bytes in a 32-bit system) when allocating space for n pointers. ...