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How to index characters in a Golang string?
... for Unicode characters, but they are both just aliases for integer types (uint8 and int32). So if you want to force them to be printed as characters instead of numbers, you need to use Printf("%c", x). The %c format specification works for any integer type.
...
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
...
Single quotes vs. double quotes in C or C++
...implementation-defined."
This could look like this, for instance:
const uint32_t png_ihdr = 'IHDR';
The resulting constant (in GCC, which implements this) has the value you get by taking each character and shifting it up, so that 'I' ends up in the most significant bits of the 32-bit value. Obv...
How can I display an image from a file in Jupyter Notebook?
...IPython.display
import numpy as np
def showarray(a, fmt='png'):
a = np.uint8(a)
f = StringIO()
PIL.Image.fromarray(a).save(f, fmt)
IPython.display.display(IPython.display.Image(data=f.getvalue()))
share
...
CGRidCtrl控件 学习心得 - C/C++ - 清泛网 - 专注C/C++及内核技术
...
函数申明：BOOL CGridCtrl::Create(const RECT& rect, CWnd* pParentWnd, UINT nID, DWORD dwStyle)
函数作用：创建控件
参数说明：
rect:控件位置信息
pParetWnd:父窗口指针
nID:为控件指定的ID,作为本次创建的控件对象的标识
dwSt...
Swift - How to convert String to Double
...String {
func doubleValue() -> Double
{
let minusAscii: UInt8 = 45
let dotAscii: UInt8 = 46
let zeroAscii: UInt8 = 48
var res = 0.0
let ascii = self.utf8
var whole = [Double]()
var current = ascii.startIndex
let negative =...
Programmatically retrieve memory usage on iPhone
... func formattedMemoryFootprint() -> String
{
let usedBytes: UInt64? = UInt64(self.memoryFootprint() ?? 0)
let usedMB = Double(usedBytes ?? 0) / 1024 / 1024
let usedMBAsString: String = "\(usedMB)MB"
return usedMBAsString
}
}
Enjoy!
Note: an enterprising...
What is the difference between a weak reference and an unowned reference?
...(name: String) { self.name = name }
}
class CreditCard {
let number: UInt64
unowned let customer: Customer
init(number: UInt64, customer: Customer) { self.number = number; self.customer = customer }
}
In this example, a Customer may or may not have a CreditCard, but a CreditCard will ...
MFC SetCursor设置手型鼠标光标 - C/C++ - 清泛网 - 专注C/C++及内核技术
...设置手型鼠标光标，部分代码如下：void CxxxDlg::OnMouseMove(UINT nFlags, CPoint point){__super::OnMouseMove(nFlags, point);int...设置手型鼠标光标，部分代码如下：
void CxxxDlg::OnMouseMove(UINT nFlags, CPoint point)
{
__super::OnMouseMove(nFlags, point);
int nI...
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...