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Forward declaring an enum in C++
... I was looking for enum32_t and with your answer enum XXX : uint32_t {a,b,c};
– fantastory
Feb 17 '15 at 8:19
...
MFC RadioButton用法详解 - C/C++ - 清泛网 - 专注C/C++及内核技术
...数
virtual BOOL OnInitDialog();
afx_msg void OnSysCommand(UINT nID, LPARAM lParam);
afx_msg void OnPaint();
afx_msg HCURSOR OnQueryDragIcon();
DECLARE_MESSAGE_MAP()
public:
BOOL m_Radio1;
BOOL m_Radio3;
BOOL m_Radio7;
BOOL m_R...
Can I call memcpy() and memmove() with “number of bytes” set to zero?
...ssembly, and try to copy most of the bits using the native word size (e.g. uint32_t on x86), but that doesn't change the substance of the answer: it's a while loop that doesn't need great calculations before starting, so the check is already done.
– Matteo Italia
...
How to determine CPU and memory consumption from inside a process?
...struct statfs stats;
if (0 == statfs("/", &stats))
{
myFreeSwap = (uint64_t)stats.f_bsize * stats.f_bfree;
}
Total Virtual Currently Used
Calling systcl with the "vm.swapusage" key provides interesting information about swap usage:
sysctl -n vm.swapusage
vm.swapusage: total = 3072.00M u...
VC 对话框背景颜色、控件颜色 - C/C++ - 清泛网 - 专注C/C++及内核技术
...
}
方法三 ：重载OnCtlColor (CDC* pDC, CWnd* pWnd, UINT nCtlColor)，即WM_CTLCOLOR消息。具体步骤如下（以上例工程为准）：
①在CExampleDlgDlg的头文件中，添加一个CBrush的成员变量：
class CExampleDlgDlg : public CDia...
How to get device make and model on iOS?
...turn identifier }
return identifier + String(UnicodeScalar(UInt8(value)))
}
return identifier
}
}
print(UIDevice.current.modelName)
The result should be:
// Output on a simulator
@"i386" on 32-bit Simulator
@"x86_64" on 64-bit Simul...
How do I get the color from a hexadecimal color code using .NET?
...hod:
static class ExtensionMethods
{
public static Color ToColor(this uint argb)
{
return Color.FromArgb((byte)((argb & -16777216)>> 0x18),
(byte)((argb & 0xff0000)>> 0x10),
(byte)((argb & 0...
Pandas read_csv low_memory and dtype options
...ain use is for indexing. See more here
'Int8', 'Int16', 'Int32', 'Int64', 'UInt8', 'UInt16', 'UInt32', 'UInt64' are all pandas specific integers that are nullable, unlike the numpy variant.
'string' is a specific dtype for working with string data and gives access to the .str attribute on the series...
In C/C++ what's the simplest way to reverse the order of bits in a byte?
... 0x4, 0xc, 0x2, 0xa, 0x6, 0xe,
0x1, 0x9, 0x5, 0xd, 0x3, 0xb, 0x7, 0xf, };
uint8_t reverse(uint8_t n) {
// Reverse the top and bottom nibble then swap them.
return (lookup[n&0b1111] << 4) | lookup[n>>4];
}
// Detailed breakdown of the math
// + lookup reverse of bottom nibble...
Simple calculations for working with lat/lon and km distance?
...> CLLocation {
let latDistance = (Double(arc4random()) / Double(UInt32.max)) * offset * 2.0 - offset
let longDistanceMax = sqrt(offset * offset - latDistance * latDistance)
let longDistance = (Double(arc4random()) / Double(UInt32.max)) * longDistanceMax * 2.0 - longDistanc...