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Which is more efficient, a for-each loop, or an iterator?
...nswered Mar 17 '18 at 9:45
denis_lordenis_lor
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How do I log errors and warnings into a file?
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Use the following code:
ini_set("log_errors", 1);
ini_set("error_log", "/tmp/php-error.log");
error_log( "Hello, errors!" );
Then watch the file:
tail -f /tmp/php-error.log
Or update php.ini as described in this blog entry from 2008.
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std::mutex 加锁抛 _DEVICE_OR_RESOURCE_BUSY 异常 - C/C++ - 清泛网 - 专注C/C++及内核技术
std::mutex 加锁抛 _DEVICE_OR_RESOURCE_BUSY 异常device_or_resource_busy最近遇到一个崩溃，在 std::lock_guard<std::mutex> lock(mutex_); 的地方，抛出了_DEVICE_OR_RESOURCE_BUSY 的异常。最终查出原因是：同一个线程对同一个mutex二次加锁导致的 最近遇到...
未能从“const std::string”为“const std::_Tree<_Traits> &”...
http://blog.csdn.net/mfcing/article/details/44157227
error LNK2019: 无法解析的外部符号 _GetFileVersionInfoSizeW@8，该符号在...
GetFileVersionInfoSize build时出现link2019 链接错误：
#pragma comment(lib, "version")
解决。
Intel SMID指令集编译错误: inlining failed in call to always_inline \'x...
Intel SMID指令集编译错误: inlining failed in call to always_inline 'xxx': target specific option mismatch xxxintel_smid_compile_error最近在使用CPU指令集优化代码的时候，编译出错，报错如下： usr lib64 gcc x86_64-suse-linux 7 include avx2intrin h:252:1: error: inlining ...
下拉刷新拓展 - SwipeRefresh - App Inventor 2 拓展 - 清泛IT社区，为创新赋能！
...无视。Material Design所推荐使用的颜色
调用SwipeRefresh1 ▾._Color_holo_blue_bright
调用SwipeRefresh1 ▾._Color_holo_blue_dark
调用SwipeRefresh1 ▾._Color_holo_blue_light
调用SwipeRefresh1 ▾._Color_holo_green_dark
调用SwipeRefresh1 ▾._Color_holo_green_ligh...
“No such file or directory” error when executing a binary
I was installing a binary Linux application on Ubuntu 9.10 x86_64. The app shipped with an old version of gzip (1.2.4), that was compiled for a much older kernel:
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Which MySQL datatype to use for an IP address? [duplicate]
I want to get the IP address from $_SERVER['REMOTE_ADDR'] and some other $_SERVER variables, which datatype is the right one for this?
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What is Prefix.pch file in Xcode?
...ngs (Command-Option-E, build tab) and uncheck Precompile Prefix Header (GCC_PRECOMPILE_PREFIX_HEADER). You can also remove the value of the Prefix Header setting if you wish.
Also note that,
Don't put macros in a.pch file! A .pch file is, by definition, a project specific precompiled header. It re...