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Get operating system info
I recently started wondering about sites like http://thismachine.info/ that get the user's operating system info. I have not been able to find out how to do that with PHP, and wanted to try to figure it out.
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WebSockets protocol vs HTTP
...ny blogs and discussions about websocket and HTTP, and many developers and sites strongly advocate websockets, but i still can not understand why.
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Why should we NOT use sys.setdefaultencoding(“utf-8”) in a py script?
...Python scans the environment. It has to be called in a system-wide module, sitecustomize.py, After this module has been evaluated, the setdefaultencoding() function is removed from the sys module.
The only way to actually use it is with a reload hack that brings the attribute back.
Also, the use...
How does Google Instant work?
...\x22\\x3eA language-independent collaboratively edited question and answer site for programmers.\\x3cbr\\x3e\\x3cspan class\\x3df\\x3e\\x3ccite\\x3e\\x3cb\\x3estackoverflow\\x3c/b\\x3e.com/\\x3c/cite\\x3e - \\x3cspan class\\x3dgl\\x3e\\x3ca href\\x3d\\x22http://webcache.googleusercontent.com/search?...
Is there a list of screen resolutions for all Android based phones and tablets? [closed]
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You can see a lot of screen sizes on this site.
Parsed list of screens:
From http://www.emirweb.com/ScreenDeviceStatistics.php
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# Filter out same-sized same-dp s...
Algorithm to compare two images
...f the final image. If however you are dealing with images of construction sites, regions of interest may be interpreted by the illegal copier as ugly and may be cropped/edited out liberally. Keep in mind common features of your dataset, and attempt to exploit that knowledge.
Morphing
Morphing tw...
How to detect if multiple keys are pressed at once using JavaScript?
...o of A, the keyup event fires, causing the same logic to determine the opposite result for map[65] (A), which is now false, but since map[66] (B) is still "down" (it hasn't triggered a keyup event), it remains true.
The map array, through both events, looks like this:
// keydown A
// keydown B
[
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How exactly does the callstack work?
... might also see xorl rax rax instead of movl.
leave and return to the call site. leave is abbreviating this epilogue and implicitly
Replaces the stack pointer with the base pointer and
Pops the base pointer.
After this operation and ret have been performed, the frame has effectively been popp...
In Python, how do I determine if an object is iterable?
Is there a method like isiterable ? The only solution I have found so far is to call
21 Answers
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How should one use std::optional?
... but I don't understand when I should use it or how I should use it. The site doesn't contain any examples as of yet which leaves it harder for me to grasp the true concept of this object. When is std::optional a good choice to use, and how does it compensate for what was not found in the previo...