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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
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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?
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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+/=
...
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. ...
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)
...
Finding three elements in an array whose sum is closest to a given number
...We've found the answer.
The sum was too small. Move j closer to the end to select the next biggest number.
The sum was too big. Move k closer to the beginning to select the next smallest number.
For each i, the pointers of j and k will gradually get closer to each other. Eventually they will pass ...
Will using 'var' affect performance?
... answered Nov 18 '09 at 14:42
RichardODRichardOD
27.4k88 gold badges5454 silver badges7676 bronze badges
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Remove spaces from std::string in C++
...ed way to remove spaces from a string in C++? I could loop through all the characters and build a new string, but is there a better way?
...
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
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string to string array conversion in java
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Assuming you really want an array of single-character strings (not a char[] or Character[])
1. Using a regex:
public static String[] singleChars(String s) {
return s.split("(?!^)");
}
The zero width negative lookahead prevents the pattern matching at the start ...