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Is it better to use std::memcpy() or std::copy() in terms to performance?
...I just did a test and found that to be untrue: I did notice a performance difference. However, the winner was std::copy.
I wrote a C++ SHA-2 implementation. In my test, I hash 5 strings using all four SHA-2 versions (224, 256, 384, 512), and I loop 300 times. I measure times using Boost.timer. That...
How to find all combinations of coins when given some dollar value
...rful book Generatingfunctionology: math.upenn.edu/~wilf/DownldGF.html) and if you mean an expression like (1+√5)^n, it takes Ω(log n) time to compute, not constant time.
– ShreevatsaR
Jul 10 '09 at 18:33
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UnicodeDecodeError: 'charmap' codec can't decode byte X in position Y: character maps to
...atin-1, UTF-8 (where 0x90 is a continuation byte) is more likely.
You specify the encoding when you open the file:
file = open(filename, encoding="utf8")
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SQL Server Regular expressions in T-SQL
...racters.
_ Any single character.
[ ] Any single character within the specified range
(for example, [a-f]) or set (for example, [abcdef]).
[^] Any single character not within the specified range
(for example, [^a - f]) or set (for example, [^abcdef]).
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How do I use define_method to create class methods?
This is useful if you are trying to create class methods metaprogramatically:
6 Answers
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How to get the filename without the extension in Java?
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If you, like me, would rather use some library code where they probably have thought of all special cases, such as what happens if you pass in null or dots in the path but not in the filename, you can use the following:
impo...
C++ unordered_map using a custom class type as the key
...by overloading operator==() for your key type (as you did already).
The difficulty with the hash function is that if your key type consists of several members, you will usually have the hash function calculate hash values for the individual members, and then somehow combine them into one hash valu...
Using smart pointers for class members
...for manual memory management. - END NOTE 2]
The situation is radically different, of course, if your Settings object should not have the exclusive ownership of the device. This could be the case, for instance, if the destruction of the Settings object should not imply the destruction of the point...
Use of Finalize/Dispose method in C#
...);
}
protected virtual void Dispose(bool disposing)
{
if (disposing)
{
// get rid of managed resources
}
// get rid of unmanaged resources
}
// only if you use unmanaged resources directly in B
//~B()
//{
// Dispose(...
onCreateOptionsMenu inside Fragments
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it won't be called if you don't add this line: setHasOptionsMenu(true);
– Yoann Hercouet
Sep 21 '13 at 10:01
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