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Why is XOR the default way to combine hashes?
...XOR is not a good way to combine hashes due to its commutativity. Consider what would happen if you stored the permutations of {1, 2, …, 10} in a hash table of 10-tuples.
A much better choice is m * H(A) + H(B), where m is a large odd number.
Credit: The above combiner was a tip from Bob Jenkins...
Get position/offset of element relative to a parent container?
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what about position fixed? are they offset parents?
– Ayyash
Apr 28 '14 at 5:48
1
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Django: “projects” vs “apps”
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What is to stop you using myproduct.myproduct? What you need to achieve that roughly consists of doing this:
django-admin.py startproject myproduct
cd myproduct
mkdir myproduct
touch myproduct/__init__.py
touch myproduct/mod...
How do I fix “for loop initial declaration used outside C99 mode” GCC error?
... @Spudd86: Whether you want to enable gcc extensions depends on what you're doing. Disabling them is helpful if your goal is to write code that's portable to compilers other than gcc.
– Keith Thompson
Sep 12 '13 at 23:40
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What is the difference between #include and #include “filename”?
In the C and C++ programming languages, what is the difference between using angle brackets and using quotes in an include statement, as follows?
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CSS \9 in width property
What is the meaning of this? I am guessing it is a browser hack, but I have not been able to find what exactly it does.
4 A...
Asynchronous shell commands
...fferent from putting the & inside your script, which probably won't do what you want.
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What is the rationale behind having companion objects in Scala?
...lly that important)
with different possible sets of parameters (compare to what Bloch writes in Effective Java about telescoping constructor)
with the ability to to decide which derived class you want to create instead of the abstract (accompanied) one
Example code:
abstract class AbstractClass;
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How can I match on an attribute that contains a certain string?
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@Redbeard: It's a literal answer but not usually what a class-matching solution should aim for. In particular it would match <div class="Patagonia Halbtagsarbeit">, which contains the target strings but is not a div with the given classes.
– bobi...
C++11 rvalues and move semantics confusion (return statement)
...ization as it will inhibit return value optimization.
The best way to code what you're doing is:
Best practice
std::vector<int> return_vector(void)
{
std::vector<int> tmp {1,2,3,4,5};
return tmp;
}
std::vector<int> rval_ref = return_vector();
I.e. just as you would in C++...