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What are the differences between NP, NP-Complete and NP-Hard?
...bitrary vertex, color it red and all of its neighbours blue and continue. Stop when you run out of vertices or you are forced to make an edge have both of its endpoints be the same color.
NP
NP is a complexity class that represents the set of all decision problems for which the instances where t...
WebSockets protocol vs HTTP
...cant changes to TCP is next to impossible. However, since QUIC is built on top of UDP, it suffers from no such limitations. QUIC is designed and optimised for HTTP/2 semantics.
References:
HTTP:
Wikipedia HTTP Page
W3C List of HTTP related Drafts/Protocols
List of IETF HTTP/1.1 and HTTP/2.0 D...
How do I create a simple 'Hello World' module in Magento?
...to be a shopping cart solution that other programmers can build modules on top of. It was not engineered to be easily understood by people who are smart, but aren't programmers.
Third, Magento MVC is very different from the Ruby on Rails, Django, CodeIgniter, CakePHP, etc. MVC model that's popular ...
Why should we NOT use sys.setdefaultencoding(“utf-8”) in a py script?
I have seen few py scripts which use this at the top of the script. In what cases one should use it?
4 Answers
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Lock-free multi-threading is for real threading experts
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Now, it is sure against intuition that a sequence of code does not flow "top-down", instead it runs as if there was no sequence at all - and may be called "devil's playground". I believe it is infeasible to give an exact answer as to what load/store re-orderings will take place. Instead, one alway...
A complete solution to LOCALLY validate an in-app receipts and bundle receipts on iOS 7
... As @pechar said, you should never do this. Please add it to the top of your answer. See WWDC session at 36:32 => developer.apple.com/videos/play/wwdc2016/702
– cicerocamargo
Sep 4 '19 at 18:49
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What is the most effective way for float and double comparison?
...< EPSILON;
}
Edit: Christer has added a stack of great info on this topic on a recent blog post. Enjoy.
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How to automatically generate a stacktrace when my program crashes
...each frame in the stack came from. Here you can see the signal handler on top of the stack, and the libc functions before main in addition to main, foo, bar, and baz.
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What is the best way to stop people hacking the PHP-based highscore table of a Flash game
...ne is going to defeat any system you come up with. The objective isn't to stop this attack; it's to make the attack more expensive than just getting really good at the game and beating it.
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How do JavaScript closures work?
...nce to its outer scope, and so on, all the way to the global object at the top of the scope chain.
A closure is created when a function is declared; this closure is used to configure the execution context when the function is invoked.
A new set of local variables is created every time a function is ...