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What does dot (.) mean in a struct initializer?
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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Google Authenticator implementation in Python
...ected with incorrect value of secret key (it must be correct parameter for base64.b32decode() function).
Below I post full working solution with explanation on how to use it.
Code
The following code is enough. I have also uploaded it to GitHub as separate module called onetimepass (available here...
What does the brk() system call do?
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If you want to do fancy memory allocation, either base it oon top of malloc, or on top of mmap. Don't touch brk and sbrk, they are relics from the past that do more harm than good (even the manpages tell you to stay clear of them!)
– Eloff
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How do the likely/unlikely macros in the Linux kernel work and what is their benefit?
...ady be fetched and in cache, the branch target maybe or maybe not. With a 64 bit CPU you grab at least 64 bits at a time. Depending on DRAM interleave, it may be 2x 3x or more bits that get grabbed.
– Bryce
Feb 15 '17 at 19:39
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how to use XPath with XDocument?
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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Container View Controller Examples [closed]
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Ditto. It's not my favorite demo code example, but it does properly implement VC containers as well as memory management -- it's really important that your child view controllers get released when they are no longer visible.
– memm...
How do I install Python OpenCV through Conda?
...nCV 3.x - mainly because this is how the OpenCV-Python Tutorials are setup/based on.
In my case, I've extracted the package (essentially a folder) straight to my C drive (C:\opencv).
Copy and Paste the cv2.pyd file
The Anaconda Site-packages directory (e.g. C:\Users\Johnny\Anaconda\Lib\site-packa...
Regex: match everything but specific pattern
...ttern (e.g. any - empty, too - string not starting with foo):
Lookahead-based solution for NFAs:
^(?!foo).*$
^(?!foo)
Negated character class based solution for regex engines not supporting lookarounds:
^(([^f].{2}|.[^o].|.{2}[^o]).*|.{0,2})$
^([^f].{2}|.[^o].|.{2}[^o])|^.{0,2}$
a string ...
Is gcc std::unordered_map implementation slow? If so - why?
...ng the code on GCC.
My answer is just to establish some kind of knowledge base to other answers.
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How do I print a double value with full precision using cout?
...he accuracy (I forget the exact terminology) of a floating point number in base 10.
See: http://www.cplusplus.com/reference/std/limits/numeric_limits.html
For details about other attributes.
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