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Why does this loop produce “warning: iteration 3u invokes undefined behavior” and output more than 4
...ue representation of that particular size of integer.
and e.g. result of UINT_MAX + 1 is mathematically defined - by the rules of arithmetic modulo 2n
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What is the performance of Objects/Arrays in JavaScript? (specifically for Google V8)
...ined",
["Array.prototype.pop"]);
}
var n = TO_UINT32(this.length);
if (n == 0) {
this.length = n;
return;
}
n--;
var value = this[n];
this.length = n;
delete this[n];
return value;
}
function ArrayPush() {
if (IS_NULL_OR_UNDEFINED(this) &&am...
Objective-C parse hex string to integer
...cases that NSScanner gives you more control over.
– Quintin Willison
Mar 30 '17 at 14:15
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Saving a Numpy array as an image
...
Using third axis of an array of uint8 to code RGB works with this method. Module PIL can be installed using "pip install pillow".
– bli
Aug 16 '17 at 8:16
...
Extracting text OpenCV
....RETR_EXTERNAL, cv2.CHAIN_APPROX_NONE)
mask = np.zeros(bw.shape, dtype=np.uint8)
for idx in range(len(contours)):
x, y, w, h = cv2.boundingRect(contours[idx])
mask[y:y+h, x:x+w] = 0
cv2.drawContours(mask, contours, idx, (255, 255, 255), -1)
r = float(cv2.countNonZero(mask[y:y+h, x:...
What is the tilde (~) in the enum definition?
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So it's the equivalent of All = Int32.MaxValue? Or UInt32.MaxValue?
– Joel Mueller
Dec 23 '08 at 18:52
2
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Better way to get type of a Javascript variable?
... The regex would also need to include numbers for things like Uint8Array. Instead, consider the more general match(/\s([^\]]+)/) which should handle anything.
– Lily Finley
Jan 19 '15 at 22:43
...
Show a Form without stealing focus?
... SW_SHOWNOACTIVATE = 4;
private const int HWND_TOPMOST = -1;
private const uint SWP_NOACTIVATE = 0x0010;
[DllImport("user32.dll", EntryPoint = "SetWindowPos")]
static extern bool SetWindowPos(
int hWnd, // Window handle
int hWndInsertAfter, // Placement-order handle
int ...
When should I use malloc in C and when don't I?
...ory leaks when using malloc. Consider this code:
int do_something() {
uint8_t* someMemory = (uint8_t*)malloc(1024);
// Do some stuff
if ( /* some error occured */ ) return -1;
// Do some other stuff
free(someMemory);
return result;
}
Do you see what's wrong with this c...
'size_t' vs 'container::size_type'
...ct type, so for example one knows where the type wraps around to (like, to UINT_MAX) so that one can make use of that. Or for templates, where you really need to pass two identical types to function/class templates.
Often i find i use size_t for brevity or iterators anyway. In generic code, since y...