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What are the differences between NP, NP-Complete and NP-Hard?
...3n)
where each x_vij is a boolean variable or the negation of a variable from a finite predefined list (x_1, x_2, ... x_n).
It can be shown that every NP problem can be reduced to 3-SAT. The proof of this is technical and requires use of the technical definition of NP (based on non-deterministic...
Is there a good way to attach JavaScript objects to HTML elements?
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From my experience the reason this can be bad is possible memory leaks. There might be an easy way to avoid it, but when I made a design that used this heavily it had many memory leaks. I think you have to be extra careful ...
C# operator overload for `+=`?
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Overloadable Operators, from MSDN:
Assignment operators cannot be overloaded, but +=, for example, is evaluated using +, which can be overloaded.
Even more, none of assignment operators can be overloaded. I think this is because there will be ...
Find out how much memory is being used by an object in Python [duplicate]
...AntonyHatchkins as python memory manager do not necessarily get new memory from the operating systems. To some extent, memory pool is kept allocated even if not in use, so when there's a new request, it may be fulfilled without the need to request more memory from the operating system. In other word...
Unicode character for “X” cancel / close?
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You can also use multiplication character ' × '. Taken from this question.
– Kamil Sarna
Jan 9 '12 at 11:28
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Detecting a redirect in ajax request?
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Welcome to the future!
Right now we have a "responseURL" property from xhr object. YAY!
See How to get response url in XMLHttpRequest?
However, jQuery (at least 1.7.1) doesn't give an access to XMLHttpRequest object directly.
You can use something like this:
var xhr;
var _orgAjax = jQuer...
differences in application/json and application/x-www-form-urlencoded
...m-urlencoded";
Where does application/x-www-form-urlencoded's name come from?
If you send HTTP GET request, you can use query parameters as follows:
http://example.com/path/to/page?name=ferret&color=purple
The content of the fields is encoded as a query string. The application/x-www-form- ...
What is the difference between isinstance('aaa', basestring) and isinstance('aaa', str)?
... pages for simplicity). Unicode strings (unicode) can represent characters from any alphabet including some fictional ones like Klingon.
So why have two kinds of strings, would it not be better to just have Unicode since that would cover all the cases? Well it is better to have only Unicode but Pyt...
Why does the C preprocessor interpret the word “linux” as the constant “1”?
...ether its a good idea or not. I am firm in the belief that such deviations from the standard should be easy to find in the documentation.
– rici
Oct 6 '13 at 19:43
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How do you dynamically add elements to a ListView on Android?
... If element in ArrayList is more complicated such as loading from Internet and each item contains image video and something like that,would this approach face performance hit?
– zionpi
Feb 18 '16 at 8:30
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