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How to write a large buffer into a binary file in C++, fast?
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Yes. From my experience, smaller buffer sizes are usually optimal. The exception is when you're using FILE_FLAG_NO_BUFFERING - in which larger buffers tend to be better. Since I think FILE_FLAG_NO_BUFFERING is pretty much DMA.
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Python setup.py develop vs install
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From the documentation. The develop will not install the package but it will create a .egg-link in the deployment directory back to the project source code directory.
So it's like installing but instead of copying to the si...
Should the hash code of null always be zero, in .NET
...n.Spring;
Season? vnull = null;
if(vnull == v) // never TRUE
EDIT
From MSDN
If two objects compare as equal, the GetHashCode method for each object must return the same value. However, if two objects do not compare as equal, the GetHashCode methods for the two object do not have to return ...
Default parameters with C++ constructors [closed]
...defaults for all but one parameter, your class can be implicitly converted from that parameter type. Check out this thread for more info.
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Java associative-array
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I think I like this method better thanks. Coming from php where everything is so simple is sort of awkward using java, but great solution. Thanks.
– frostymarvelous
Jan 25 '12 at 12:58
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Double Negation in C++
...actually a very useful idiom in some contexts. Take these macros (example from the Linux kernel). For GCC, they're implemented as follows:
#define likely(cond) (__builtin_expect(!!(cond), 1))
#define unlikely(cond) (__builtin_expect(!!(cond), 0))
Why do they have to do this? GCC's __builtin_...
Finding a substring within a list in Python [duplicate]
...*1000
sub = 'abc'
timeit.timeit('[s for s in mylist if sub in s]', setup='from __main__ import mylist, sub', number=100000)
# for me 7.949463844299316 with Python 2.7, 8.568840944994008 with Python 3.4
timeit.timeit('next((s for s in mylist if sub in s), None)', setup='from __main__ import mylist, ...
How to convert an ArrayList containing Integers to primitive int array?
...i -> i).toArray();
What it does is:
getting a Stream<Integer> from the list
obtaining an IntStream by mapping each element to itself (identity function), unboxing the int value hold by each Integer object (done automatically since Java 5)
getting the array of int by calling toArray
Yo...
Visual Studio keyboard shortcut to automatically add the needed 'using' statement
...LL file, then ReSharper is able to see that the TestFixtureAttribute comes from that DLL file, so it will automatically add that assembly reference to your new project.
And it also adds required namespaces for extension methods. At least the ReSharper version 5 beta does. I'm pretty sure that Visua...
Check whether an array is a subset of another
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Lets take the example from your comment t2={1,2,3,4,5,6,7,8} t1={2,4,6,8} t2.Except(t1) => first element of t2 = 1 => difference of 1 to t1 is 1 (checked against {2,4,6,8}) => Except() emits first element 1 => Any() gets an element =&g...