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numpy matrix vector multiplication [duplicate]
...
Other Solutions
Also know there are other options:
As noted below, if using python3.5+ the @ operator works as you'd expect:
>>> print(a @ b)
array([16, 6, 8])
If you want overkill, you can use numpy.einsum. The documentation will give you a flavor for how it works, but honestly,...
How to auto-generate a C# class file from a JSON string [closed]
...ve options:
Use the free jsonutils web tool without installing anything.
If you have Web Essentials in Visual Studio, use Edit > Paste special > paste JSON as class.
Use the free jsonclassgenerator.exe
The web tool app.quicktype.io does not require installing anything.
The web tool json2c...
Swift: Determine iOS Screen size [duplicate]
I would like to use Swift code to properly position items in my app for no matter what the screen size is. For example, if I want a button to be 75% of the screen wide, I could do something like (screenWidth * .75) to be the width of the button. I have found that this could be determined in Object...
NtMapViewOfSection注入 - C/C++ - 清泛网 - 专注C/C++及内核技术
...ss;
ViewSize = dwNumberOfBytesToMap;
// 转换标志为NT保护属性
if (dwDesiredAccess & FILE_MAP_WRITE)
{
Protect = PAGE_READWRITE;
}
else if (dwDesiredAccess & FILE_MAP_READ)
{
Protect = PAGE_READONLY;
}
else if (dwDesiredAccess & FILE_MAP_COPY)
{
Protect = PAGE_WRITECOPY;
}
el...
c++获取windows程序的版本号 - C/C++ - 清泛网 - 专注C/C++及内核技术
...aSize = ::GetFileVersionInfoSize((LPTSTR)lpszModuleName, &dwHandle);
if ( dwDataSize == 0 )
return FALSE;
// Allocate buffer and retrieve version information
LPBYTE lpVersionData = new BYTE[dwDataSize];
if (!::GetFileVersionInfo((LPTSTR)lpszModuleName, dwHandle, dwD...
AfxGetApp->GetMainWnd() 与 AfxGetMainWnd() - C/C++ - 清泛网 - 专注C/C++及内核技术
...adState();
CWinThread* pThread = pState->m_pCurrentWinThread;
// if no CWinThread for the module, then use the global app
if (pThread == NULL)
pThread = AfxGetApp();
return pThread;
}
可以看出当取得的线程句柄为空时,则返回主线程句柄，所以在主...
stl 字符串std::string作为std::map主键key的实例 - C/C++ - 清泛网 - 专注C/C++及内核技术
...个实例介绍std::map字符串作为key的常见用法，并使用find_if实现map按value值查找。代码如下：
#include <map>
#include <string>
#include <algorithm>
using namespace std;
class map_value_finder
{
public:
map_value_finder(const std::string &cmp_string):m_s_cmp_...
c++ Timer使用总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
...age(&msg,NULL,NULL,NULL)) && (itemp!=0) && (-1 != itemp) )
{
if (msg.message == WM_TIMER)
{
std::cout << "i got the message " << std::endl;
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
}
多线程使用Timer：
#include <stdafx.h>
#inc...
CListCtrl 行高设置，自定义行高 - C/C++ - 清泛网 - 专注C/C++及内核技术
... CMyListCtrl::MeasureItem(LPMEASUREITEMSTRUCT lpMeasureItemStruct)
{
if (m_nRowHeight>0)
{
lpMeasureItemStruct->itemHeight = m_nRowHeight;
}
}
void CMyListCtrl::OnMeasureItem(int nIDCtl, LPMEASUREITEMSTRUCT lpMeasureItemStruct)
{
CListCtrl::OnMeasureItem(nIDCtl, lp...
VC中CStatic等控件字体颜色的设置和OnCtlColor的使用 - C/C++ - 清泛网 - ...
...
HBRUSH CAboutDig::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor)
{
if (nCtlColor == CTLCOLOR_STATIC)
{
pDC->SetTextColor(RGB(0,0,255));//设置字体颜色
pDC->SetBkMode(TRANSPARENT); //设置背景透明
}
}
第三个参数OnCtlColor主要有以下的值：
...