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c++11右值引用、std::move移动语义、std::forward完美转发的一些总结 - C/C...

...还能拷贝构造,保障代码安全。对于一些基本类型如int和char[10]等,使用std::move()仍然会发生拷贝,因为没有对应的移动构造函数。 对于完美转发而言,右值引用并非“天生神力”,只是c++11新引入了右值,因此为其新定下了引...
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window+nginx+php-cgi的php-cgi线程/子进程问题 - 更多技术 - 清泛网 - 专注C/C++及内核技术

... /* Pre-fork, if required */ if (getenv("PHP_FCGI_CHILDREN")) { char * children_str = getenv("PHP_FCGI_CHILDREN"); ... So, php with fast-cgi will **never** work on Windows. The question is, why is forking disabled under windows? -------------https://bugs.php.net/bug.ph...
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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...
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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...
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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...
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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...
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【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
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How to get all groups that a user is a member of?

... Thanks! this worked. only downside is the value returned is a string. – shaiss Nov 15 '12 at 21:25 3 ...
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Java: Date from unix timestamp

... Instant instant = Instant.ofEpochSecond( 1_280_512_800L ); instant.toString(): 2010-07-30T18:00:00Z See that code run live at IdeOne.com. Asia/Kabul or Asia/Tehran time zones ? You reported getting a time-of-day value of 22:30 instead of the 18:00 seen here. I suspect your PHP utility is...
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What is a monad?

... element types, for example transform an array of numbers into an array of strings or something else. As long as it still an Array. This can be described a bit more formally using Typescript notation. An array have the type Array<T>, where T is the type of the elements in the array. The method...