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Run certain code every n seconds [duplicate]

...o through whatever code I had, then once it had been 5 seconds (with time.sleep() ) it would execute that code. I would be using this to update a file though, not print Hello World. ...
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OnInitUpdate、OnUpdate、OnDraw与OnPaint - C/C++ - 清泛网 - 专注C/C++及内核技术

...视,由它来通知各个视是最合适的。让我们同时看两个 函数: void CView::OnUpdate( CView* pSender, LPARAM lHint, CObject* pHint ) void CDocument::UpdateAllViews( CView* pSender, LPARAM lHint = 0L, CObject* pHint = NULL ) 当文档的UpdateAllViews被调用时和此...
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How to wait in bash for several subprocesses to finish and return exit code !=0 when any subprocess

...y.com/blog/archives/010717.html : #!/bin/bash FAIL=0 echo "starting" ./sleeper 2 0 & ./sleeper 2 1 & ./sleeper 3 0 & ./sleeper 2 0 & for job in `jobs -p` do echo $job wait $job || let "FAIL+=1" done echo $FAIL if [ "$FAIL" == "0" ]; then echo "YAY!" else echo "FAIL! ($FAIL...
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OS X Bash, 'watch' command

...basic functionality with the shell loop: while :; do clear; your_command; sleep 2; done That will loop forever, clear the screen, run your command, and wait two seconds - the basic watch your_command implementation. You can take this a step further and create a watch.sh script that can accept yo...
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CoInitialize浅析一 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术

...知道程序中若要使用COM组件则必须要先调用CoInitialize,该函数主要是用来初始化COM运行环境。但这个函数的作用域是以线程为单位还是 大家都知道程序中若要使用COM组件则必须要先调用CoInitialize,该函数主要是用来初始化COM运...
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CDHtmlDialog的基本使用(C++调用JS函数的实现) - C/C++ - 清泛网 - 专注IT技能提升

CDHtmlDialog的基本使用(C++调用JS函数的实现)CDHtmlDialog_cpp_call_js_interactiveCDHtmlDialog C++ JS《CDHtmlDialog的基本使用(JS调用C++函数的实现)》本文基于以上文章,在其代码基础上拓展:一、在主对话框上添加一个C++按钮,步骤如下:....
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boost自定义composite_key_compare比较函数 - C/C++ - 清泛网 - 专注C/C++及内核技术

boost自定义composite_key_compare比较函数composite_key_compare指定boost多容器元素的比较方法,当然我们也可以自定义比较函数。另外,如果调试过程中遇到很奇怪的问题,可以在自定义比较函数中下断点进行调试。 // boost_demo.cpp : 定义...
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c++ Timer使用总结 - C/C++ - 清泛网 - 专注C/C++及内核技术

...er: #define TIMER_ID 1000 //定时器ID,可任意。触发后回调函数中用于区别不同的定时器以执行不同的任务 SetTimer(TIMER_ID, 1000 , NULL); //启动定时器,1秒后触发 KillTimer(TIMER_ID); //取消定时器 //.h文件函数申明 afx_msg void OnTimer(UIN...
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coinitialize失败,返回值是0x80010106 无法在设置线程模式后对其加以更改 ...

...indows以什么方式为程序创建COM对象,原因是程序调用com库函数(除CoGetMalloc和内存分配函数)之前必须初始化com库。 有哪些方式呢?单线程和多线程。 CoInitialize指明以单线程方式创建。 CoInitializeEx可以指定COINIT_MULT...
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php:获取数组第一个值 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...值。不过为了兼容性,建议还是采取reset(),current(),next()等函数来取数组中的值,reset($arr)后current($arr)取第一个值。自PHP 5.4版本后可以使用 [ ] 来取数据指定位置的元素,索引从0开始,即$arr[0]取数组第一个值。不过为了兼容性,...