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Boost.Asio的简单使用(Timer,Thread,Io_service类) - C/C++ - 清泛网 - 专注C/C++及内核技术
..._time/posix_time/posix_time.hpp>
asio的异步函数会在一个异步操作完成后被回调.这里我们定义了一个将被回调的函数.
void print(const asio::error& /*e*/)
{
std::cout << "Hello, world! ";
}
int main()
{
asio::io_service io;
asio::deadline_timer t...
How to check BLAS/LAPACK linkage in NumPy and SciPy?
...like this. I think it means I am using the BLAS/LAPACK that ships with Mac OS.
>>> import numpy as np
>>> np.show_config()
lapack_opt_info:
extra_link_args = ['-Wl,-framework', '-Wl,Accelerate']
extra_compile_args = ['-msse3']
define_macros = [('NO_ATLAS_INFO', 3)]
b...
STL中map容器使用自定义key类型报错详解 - C/C++ - 清泛网 - 专注C/C++及内核技术
...象进行了大小比较，但是我们自定义的key类型a并没有对<操作符进行重载，于是报错。
那么map容器和less有什么关系呢，我们的代码怎么回链接到这里了？
看看map的模板定义就知道了：
template<class _Kty,
class _Ty,
class _...
Difference between Service, Async Task & Thread?
...ervices, AsyncTasks frequently. Thread less, or not at all, as I can do almost everything with AsyncTask.
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Error starting jboss server
I've just finished re-installing my OS, and as always install and test standard tools which I use, and now I get this error like never before when I tried to start Jboss 5 from eclipse, its quite big exeption :
...
How to sort the files according to the time stamp in unix? [closed]
...
"Newest" one at the bottom:
ls -tr
None of this is a creation time. Most Unix filesystems don't support creation timestamps.
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How to convert 'binary string' to normal string in Python3?
...
I suggest to add the following to complete the answer. Most times we need to decode bytes from our operating system, such as console output, the most pythonic way I found to do it is to import locale and then os_encoding = locale.getpreferredencoding(). This way, we can decode usi...
Installation Issue with matplotlib Python [duplicate]
...
Problem Cause
In mac os image rendering back end of matplotlib (what-is-a-backend to render using the API of Cocoa by default). There are Qt4Agg and GTKAgg and as a back-end is not the default. Set the back end of macosx that is differ compare wi...
窗口style中CHILD POPUP OVERLAPPED三者的区别 - C/C++ - 清泛网 - 专注C/C++及内核技术
...APPED-->重叠窗口POPUP --->弹出式窗口CHILD -->子窗口--------os默认是的POPUP，要注意，WS_CHILD和WS_POPUP是矛盾的，不...OVERLAPPED --> 重叠窗口
POPUP ---> 弹出式窗口
CHILD --> 子窗口
--------
os默认是的POPUP，要注意，WS_CHILD...
轻量级虚拟机Bochs - 软件下载 - 清泛网 - 专注IT技能提升
...的配置。Bochs模拟的是整个PC平台，包括I O设备、内存和BIOS。更为有趣的是，甚至可以不使用PC硬件来运行Bochs。Bochs是一种十分轻便的使用c++编写的开源IA-32(x86)电脑模拟器，可以运行在最受欢迎的平台上。
它是一个x86硬件平台...