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Which parallel sorting algorithm has the best average case performance?
...s exist but they have a very high constant. They also aren't applicable on commodity hardware which doesn't have anywhere near O(n) processors. With p processors, reasonable algorithms should take O(n/p log n) time.
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How to prevent gcc optimizing some statements in C?
... but it is unnecessary. A safer alternative is to make it illegal for the compiler to optimize out the store by using the volatile type qualifier.
// Assuming pageptr is unsigned char * already...
unsigned char *pageptr = ...;
((unsigned char volatile *)pageptr)[0] = pageptr[0];
The volatile typ...
What's the difference between dist-packages and site-packages?
...derivatives, like Ubuntu. Modules are installed to dist-packages when they come from the Debian package manager into this location:
/usr/lib/python2.7/dist-packages
Since easy_install and pip are installed from the package manager, they also use dist-packages, but they put packages here:
/usr/lo...
How to format all Java files in an Eclipse project at one time?
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How do you manually execute SQL commands in Ruby On Rails using NuoDB
I'm trying to manually execute SQL commands so I can access procedures in NuoDB.
4 Answers
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Code coverage with Mocha
...you get your mocha tests to pass:
npm install nyc
Now, simply place the command nyc in front of your existing test command, for example:
{
"scripts": {
"test": "nyc mocha"
}
}
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Performance of static methods vs instance methods
...is makes so little difference that it'll be hidden in the noise of various compiler decisions. (Hence two people could "prove" one better than the other with disagreeing results). Not least since the this is normally passed in a register and is often in that register to begin with.
This last point ...
Javascript !instanceof If Statement
...f(!obj instanceof Array), which evaluates to true (or false), which then becomes if(bool instanceof Array), which is obviously false. Therefore, wrap it in parenthesis as suggested.
– ronnbot
Nov 26 '13 at 20:07
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Django - filtering on foreign key properties
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@DeadDjangoDjoker contains describes the type of comparison used in the query that the django ORM produces, the sql will probably look like LIKE '%Foo%'.
– orangecaterpillar
Apr 7 at 0:43
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Uncaught ReferenceError: $ is not defined?
How come this code throws an
39 Answers
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