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Difference between malloc and calloc?
..., for example since the parts of hash which are empty aren't backed by any extra memory (pages); they happily point to the single zero-initialized page, which can be even shared between processes.
Any write to virtual address is mapped to a page, if that page is the zero-page, another physical page...
Pointer expressions: *ptr++, *++ptr and ++*ptr
...
The statement also initializes p to point to the first character in the string literal "Hello". For the sake of this exercise, it's important to understand p as pointing not to the entire string, but only to the first character, 'H'. After all, p is a pointer to one char, not to the entire string...
How to disable GCC warnings for a few lines of code
...ing puts.c source code
#include <stdio.h>
int main(int argc, const char *argv[])
{
while (*++argv) puts(*argv);
return 0;
}
It will not compile because argc is unused, and the settings are hardcore (-W -Wall -pedantic -Werror).
There are 5 things you could do:
Improve the source...
Windows下 C++网络延时检测 - C/C++ - 清泛网 - 专注C/C++及内核技术
...
#define PING_TIMES 2 //ping 4 次
typedef struct _IPINFO
{
unsigned char Ttl; // Time To Live
unsigned char Tos; // Type Of Service
unsigned char IPFlags; // IP flags
unsigned char OptSize; // Size of options data
unsigned char FAR *Options; // Options data buffer
}IPINFO;...
What is the maximum length of a table name in Oracle?
...ou have a 12.2 DB with compatible set to 11.2.0, is still limits you to 30 chars.
– rtaft
Nov 15 '18 at 15:13
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Coding in Other (Spoken) Languages
...r does not how to proper write english vars names. The worst I've seen is "String employiNeim" hehe ( nahh just kidding ) but I've seen things really close to that before.
– OscarRyz
Oct 15 '08 at 22:08
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Are “while(true)” loops so bad? [closed]
...
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
String strLine;
while ((strLine = br.readLine()) != null) {
// do something with the line
}
And the usual C++ convention for reading input is:
#include <iostream>
#include <string>
std::string data;
while(st...
Named placeholders in string formatting
In Python, when formatting string, I can fill placeholders by name rather than by position, like that:
19 Answers
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Is std::vector so much slower than plain arrays?
...peline stages per array accesses. So the vector looks like it is using one extra instruction per accesses.
– Martin York
Sep 8 '10 at 3:25
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Set a default parameter value for a JavaScript function
...ou'd get a reference error if you misspelled undefined vs. putting it in a string.
– Abe Voelker
May 21 '15 at 22:04
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