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Format number as fixed width, with leading zeros [duplicate]

...format a number as integer of width 3: a <- seq(1,101,25) sprintf("name_%03d", a) [1] "name_001" "name_026" "name_051" "name_076" "name_101" Another is formatC and paste: paste("name", formatC(a, width=3, flag="0"), sep="_") [1] "name_001" "name_026" "name_051" "name_076" "name_101" ...
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vector删除元素erase和通用算法remove区别 - C/C++ - 清泛网 - 专注C/C++及内核技术

...代器来删除单个或者范围的元素 iterator erase( iterator _Where ); iterator erase( iterator _First, iterator _Last ); remove函数的定义 template<class _FwdIt, class _Ty> inline _FwdIt remove(_FwdIt _First, _FwdIt _Last, const _Ty% _Val); 与erase不同的...
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error LNK2019: 无法解析的外部符号 _GetFileVersionInfoSizeW@8,该符号在...

error LNK2019: 无法解析的外部符号 _GetFileVersionInfoSizeW@8,该符号在函数 _wmain 中被引用GetFileVersionInfoSize build时出现link2019 链接错误:#pragma comment(lib, "version")解决。GetFileVersionInfoSize build时出现link2019 链接错误: #pragma comment(lib, "v...
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常用C函数的Unicode兼容函数(持续更新) - C/C++ - 清泛网 - 专注C/C++及内核技术

...C函数的Unicode兼容函数(持续更新)C 函数Unicode版本fprintf_ftprintfaccess_taccesssprintf_stprintfstrcat_tcscat(_tcscat_s)strcmpi 是stricmp的宏定义比较两个字符串... C 函数 Unicode版本 fprintf _ftprintf access _taccess sprintf...
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error LNK2001: unresolved external symbol \"class std::basic_ostream &...

error LNK2001: unresolved external symbol "class std::basic_ostream &__cdecloperator
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error C2512: “Foo”: 没有合适的默认构造函数可用 - C/C++ - 清泛网 - 专...

...CLUDE\xmemory0(600): 编译类 模板 成员函数 “void std::allocator<_Ty>::construct(_Ty *)”时 with [ _Ty=Foo ] C:\Program Files\Microsoft Visual Studio 11.0\VC\INCLUDE\xmemory0(751): 参见对正在编译的函数 模板 实例化“void s...
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解决WaitForSingleObject阻塞UI线程的问题 - C/C++ - 清泛网 - 专注C/C++及内核技术

...塞UI线程 MSG msg; DWORD dwRet; while (TRUE) { //wait for m_hThread to be over,and wait for //QS_ALLINPUT(Any message is in the queue) dwRet = MsgWaitForMultipleObjects(1, &hThread, FALSE, INFINITE, QS_ALLINPUT); switch(dwRet) { case WAIT_OBJECT_0: break; //br...
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如何在Visual Studio中运行和调试汇编代码 - 更多技术 - 清泛网 - 专注C/C++及内核技术

如何在Visual Studio中运行和调试汇编代码使用内联汇编__asm,如下:int _tmain(int argc, _TCHAR* argv[]){ int a = 1; __asm{ ...使用内联汇编__asm,如下: int _tmain(int argc, _TCHAR* argv[]) { int a = 1; __asm{ x...
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Do I need to explicitly call the base virtual destructor?

...of concept with results: class base { public: base() { cout &lt;&lt; __FUNCTION__ &lt;&lt; endl; } ~base() { cout &lt;&lt; __FUNCTION__ &lt;&lt; endl; } }; class derived : public base { public: derived() { cout &lt;&lt; __FUNCTION__ &lt;&lt; endl; } ~derived() { cout &lt;&lt; __FU...
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搭建高可用mongodb集群(三)—— 深入副本集内部机制 - 大数据 & AI - 清...

...数也是可以运行的,参考这个文章http://www.itpub.net/thread-1740982-1-1.html。后来突然看了一篇stackoverflow的文章终于顿悟了,mongodb本身设计的就是一个可以跨IDC的分布式数据库,所以我们应该把它放到大的环境来看。 假设四个节点被...