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Pinging servers in Python
...return true (on Windows) if you get a "destination host unreachable" reply from a different host.
– ikrase
Dec 29 '16 at 20:11
...
Do regular expressions from the re module support word boundaries (\b)?
...s%3a%2f%2fstackoverflow.com%2fquestions%2f3995034%2fdo-regular-expressions-from-the-re-module-support-word-boundaries-b%23new-answer', 'question_page');
}
);
Post as a guest
...
@RequestParam vs @PathVariable
...
@PathVariable is to obtain some placeholder from the URI (Spring call it an URI Template)
— see Spring Reference Chapter 16.3.2.2 URI Template Patterns
@RequestParam is to obtain a parameter from the URI as well — see Spring Reference Chapter 16.3.3.3 Binding reque...
Difference between size_t and unsigned int?
...but that's permitted).
The purpose of size_t is to relieve the programmer from having to worry about which of the predefined types is used to represent sizes.
Code that assumes sizeof yields an unsigned int would not be portable. Code that assumes it yields a size_t is more likely to be portable.
...
Why can't C compilers rearrange struct members to eliminate alignment padding? [duplicate]
...t nameLength, extraLength;
};
The packed attribute prevents the compiler from aligning the fields according to their natural alignment, and it has no relation to the problem of field ordering. It would be possible to reorder the fields of LocalFileHeader so that the structure has both minimal size...
How do I uniquely identify computers visiting my web site?
... one possible fingerprinting algorithm, and collected these
fingerprints from a large sample of browsers that visited our test side,
panopticlick.eff.org. We observe that the distribution of our finger-
print contains at least 18.1 bits of entropy, meaning that if we pick a
brow...
Convert ArrayList to String[] array [duplicate]
...ining a primitive type object, e.g. Double, Float, Integer, Long. And then from there your normal arrays must be defined with this type, e.g. Double[] myDoubleArray = list.toArray(new Double[listOfDoubles.size()]);
– planty182
Sep 5 '13 at 13:03
...
How can I sharpen an image in OpenCV?
...ing:
You use a Gaussian smoothing filter and subtract the smoothed version from the original image (in a weighted way so the values of a constant area remain constant).
To get a sharpened version of frame into image: (both cv::Mat)
cv::GaussianBlur(frame, image, cv::Size(0, 0), 3);
cv::addWeighted(f...
ASP.NET MS11-100: how can I change the limit on the maximum number of posted form values?
... method is definitely new. I used the Disassemble option in Reflector, and from what I can tell from the code it checks an AppSetting:
if (this.Count >= AppSettings.MaxHttpCollectionKeys)
{
throw new InvalidOperationException();
}
If it doesn't find the value in the web.config file, it will ...
C++11 rvalues and move semantics confusion (return statement)
...e same, and neither is cv-qualified (don't return const types). Stay away from returning with the condition (:?) statement as it can inhibit RVO. Don't wrap the local in some other function that returns a reference to the local. Just return my_local;. Multiple return statements are ok and will ...