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Pointer arithmetic for void pointer in C
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SadeqSadeq
6,84844 gold badges2626 silver badges4444 bronze badges
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How to recover MySQL database from .myd, .myi, .frm files
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174
If these are MyISAM tables, then plopping the .FRM, .MYD, and .MYI files into a database directo...
Getting attributes of a class
...lpful.
EDIT:
For example,
class MyClass(object):
a = '12'
b = '34'
def myfunc(self):
return self.a
>>> import inspect
>>> inspect.getmembers(MyClass, lambda a:not(inspect.isroutine(a)))
[('__class__', type),
('__dict__',
<dictproxy {'__dict__': <att...
Programmatically find the number of cores on a machine
... = sysinfo.dwNumberOfProcessors;
Linux, Solaris, AIX and Mac OS X >=10.4 (i.e. Tiger onwards)
int numCPU = sysconf(_SC_NPROCESSORS_ONLN);
FreeBSD, MacOS X, NetBSD, OpenBSD, etc.
int mib[4];
int numCPU;
std::size_t len = sizeof(numCPU);
/* set the mib for hw.ncpu */
mib[0] = CTL_HW;
mib[1] =...
Why does dividing two int not yield the right value when assigned to double?
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Chad La GuardiaChad La Guardia
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How do I convert an NSString value to NSData?
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1422
NSString* str = @"teststring";
NSData* data = [str dataUsingEncoding:NSUTF8StringEncoding];
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How do I intercept a method call in C#?
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Jorge CórdobaJorge Córdoba
46k1010 gold badges7676 silver badges125125 bronze badges
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How can you find the height of text on an HTML canvas?
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answered Mar 23 '12 at 23:43
Daniel EarwickerDaniel Earwicker
106k3434 gold badges190190 silver badges271271 bronze badges
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C++ Tuple vs Struct
...e. Below is the benchmark code and performance results collected using gcc-4.9.2 and clang-4.0.0:
std::vector<StructData> test_struct_data(const size_t N) {
std::vector<StructData> data(N);
std::transform(data.begin(), data.end(), data.begin(), [N](auto item) {
std::rand...
OnNotify函数 ON_NOTIFY消息总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
...SELECT_CHANGE, GRIDCTRL_ID, &CContradictionRuleView::OnNotifyGridChanged)
4.在子窗口中发送WM_NOTIFY消息
if (this->GetParent())
{
NMHDR nmhdr;
nmhdr.hwndFrom= this->m_hWnd;
nmhdr.idFrom = 0;//m_id;
nmhdr.code = WM_GRID_SELECT_CHANGE; // 用户自定义消息
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