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Poco::Timer 用法剖析 - C/C++ - 清泛网 - 专注C/C++及内核技术

Poco::Timer 用法剖析Poco::Timer 提供了定时任务的功能,从线程池中创建一个线程,每隔一段时间让线程中的主体代码执行一次。其余时间此线程阻塞在Event.trywa...Poco::Timer 提供了定时任务的功能,从线程池中创建一个线程,每隔一...
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手把手教你用Strace诊断问题 - 更多技术 - 清泛网 - 专注C/C++及内核技术

手把手教你用Strace诊断问题早些年,如果你知道有个 strace 命令,就很牛了,而现在大家基本都知道 strace 了,如果你遇到性能问题求助别人,十有八九会建议你用 ...早些年,如果你知道有个 strace 命令,就很牛了,而现在大家...
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C#泛型(List)中基类和子类 怎么转换? - 更多技术 - 清泛网 - 专注C/C++及内核技术

C#泛型(List)中基类和子类 怎么转换?List<ChildClass> childList = ...Foo(List<BaseClass> baseList);需求:把子类列表传入函数Foo,Foo支持所有子类列表。方法一:Foo(ch...List<ChildClass> childList = ... Foo(List<BaseClass> baseList); 需求:把子类列表传入...
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boost库编译问题 - 更多技术 - 清泛网 - 专注C/C++及内核技术

boost库编译问题boost::property_tree::xml_writer_settings<std::string> settings(' t', 1, "GB2312");报错:char不能转换为std::string。1.5...boost::property_tree::xml_writer_settings<std::string> settings('\t', 1, "GB2312"); 报错:char不能转换为std::string。 1.54 版本 报...
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C#泛型(List)中基类和子类 怎么转换? - .NET(C#) - 清泛IT论坛,有思想、有深度

List<ChildClass> childList = ... Foo(List<BaseClass> baseList); 需求:把子类列表传入函数Foo,Foo支持所有子类列表。 方法一: Foo(childList.Select(p => p as BaseClass).ToList()) 上述 Select 转换是双向的,基类转子类也没问题。 方...
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c++ 代码提升权限,请求管理员身份运行权限 - 脚本技术 - 清泛IT社区,为创...

普通的启动一个程序使用CreateProcess函数,有时会遇到权限不足失败的情况,那么如何提升执行权限呢? 使用 ShellExecuteEx 函数: // ------提升权限------         // Initialize the structure.        &...
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In C#, what happens when you call an extension method on a null object?

...release build. – Martin R-L Jan 13 '10 at 8:34  |  show 5 more comments ...
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Numpy how to iterate over columns of array?

...rix. Let's create the following matrix mat2 = np.array([1,5,6,7,3,0,3,5,9,10,8,0], dtype=np.float64).reshape(3, 4) The function for mean is def my_mean(x): return sum(x)/len(x) To do what is needed and store result in colon vector 'results' results = np.zeros(4) for i in range(0, 4): ...
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Getting only response header from HTTP POST using curl

...tdout. – andrew cooke Oct 29 '13 at 10:33  |  show 7 more co...
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In what cases do I use malloc and/or new?

...need a big chunk of data just do something like: char *pBuffer = new char[1024]; Be careful though this is not correct: //This is incorrect - may delete only one element, may corrupt the heap, or worse... delete pBuffer; Instead you should do this when deleting an array of data: //This delete...