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Linux automake自动编译全攻略 - 脚本技术 - 清泛IT社区，为创新赋能！
...nclude <stdio.h>
#include "lib/calc.h"
int main(int argc, char** argv)
{
int sum = add(1, 2);
printf("sum:%d\n", sum);
r...
C语言面试那些事儿──一道指针与数组问题 - c++1y / stl - 清泛IT社区，为创新赋能！
首先看如下代码：
int main(int argc, char** argv)
{
int a[5] = {1,2,3,4,5};
int* ptr = (int*)(&a + 1);
printf("%d,%d\n", *(a+1), *(ptr-1));
return 0;
}复制代码这道题在很多所谓经典C语言面试题里是常见...
Unicode and UTF-8 - 综合 - 清泛IT论坛，有思想、有深度
...）、和ASCII码不兼容，而且不太好移植(Not Portable)
例如：char *s=“Good ,北京”;该C语言代码采用UTF-16编码后，字节序列中间有许多’\0’，’\0’ 会被识别为字符串的终止，strlen()函数不起用了。
2）、存储空间较大，造成存储及...
SHFileOperation 这个API函数怎么用起来结果飘忽不定？ - c++1y / stl - 清...
...配符查找文件，核心代码如下：
WIN32_FIND_DATA FindFileData;
char szCurPath[MAX_PATH + 1] = { 0 };
GetCurrentDirectory(MAX_PATH, szCurPath);
CString findFileName;
findFileName.Format("%stest*.txt", szCurPath);
HANDLE hFind = ::FindFirstFile(findFileName, &FindFileData);
if...
【解决】double free or corruption (!prev) - C/C++ - 清泛网 - 专注C/C++及内核技术
...大小，在free的时候也会检测出来，报这个错误，如：
char* buf = malloc(5);
memcpy(buf, "123456", 6);
free(buf); //free时报此错误
实际项目中可能此类问题没法直观定位到，推荐使用gcc自带的 asan 检查内存错误。
asan 内存跟踪
libunwind：记录程序崩溃堆栈 - 开源 & Github - 清泛网 - 专注C/C++及内核技术
...all
记录堆栈的代码如下：
static void log_backtrace(void) {
char name[256];
unw_cursor_t cursor;
unw_context_t uc;
unw_word_t ip, sp, offp;
unw_getcontext(&uc);
unw_init_local(&cursor, &uc);
syslog(LOG_ERR, "--illegal memory access--");
while(unw_step(&cursor) > 0) {...
is it possible to update UIButton title/text programmatically?
... The UIButton will ignore the title change if it already has an Attributed String to use (with seems to be the default you get when using Xcode interface builder).
I used the following:
[self.loginButton
setAttributedTitle:[[NSAttributedString alloc] initWithString:@"Error !!!" attributes:ni...
Most efficient way to create a zero filled JavaScript array?
...er.prototype.valueOf,0);
// [0, 0, 0, 0, 0]
If I want to pre-fill with a string:
Array.apply(null, Array(3)).map(String.prototype.valueOf,"hi")
// ["hi", "hi", "hi"]
Other answers have suggested:
new Array(5+1).join('0').split('')
// ["0", "0", "0", "0", "0"]
but if you want 0 (the number)...
How to get multiple select box values using jQuery?
...('#multipleSelect').val() || []; Also worth noting it returns an array of strings. I was comparing to an integer and getting no matches, so i added a .toString().
– tkerwood
Jul 27 '16 at 2:05
...
Is “inline” without “static” or “extern” ever useful in C99?
...efore, the following example might not
behave as expected.
inline const char *saddr(void)
{
static const char name[] = "saddr";
return name;
}
int compare_name(void)
{
return saddr() == saddr(); // unspecified behavior
}
Since the implementation might use the inline definition f...