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Using git repository as a database backend
...0..1000 times less than number of total users, but it makes logging in/out more complicated and slower, as it involves cloning of a per-user branch on every login and pulling these changes back on logout or session expiration (which should be done transactionally => adds another layer of complexi...
How to find the statistical mode?
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One more solution, which works for both numeric & character/factor data:
Mode <- function(x) {
ux <- unique(x)
ux[which.max(tabulate(match(x, ux)))]
}
On my dinky little machine, that can generate & find the ...
FileSystemWatcher Changed event is raised twice
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How to get URL parameter using jQuery or plain JavaScript?
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What algorithm can be used for packing rectangles of different sizes into the smallest rectangle pos
...g a little wasted data. Now I just need to rewrite my implementation to be more efficient than a linear search for each rect through the available space checking each pixel is that point is blocked (against all the existing rects)...
– Fire Lancer
Aug 5 '09 at ...
How can building a heap be O(n) time complexity?
...til it is in the correct location.
Which implementation for buildHeap is more efficient?
Both of these solutions will produce a valid heap. Unsurprisingly, the more efficient one is the second operation that uses siftDown.
Let h = log n represent the height of the heap. The work required for the s...
Remove the last three characters from a string
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I read through all these, but wanted something a bit more elegant. Just to remove a certain number of characters from the end of a string:
string.Concat("hello".Reverse().Skip(3).Reverse());
output:
"he"
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How do I create an average from a Ruby array?
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Django: Get an object form the DB, or 'None' if nothing matches
...swer to this question can be found below by @kaapstorm, and is clearly the more suitable answer. Abusing filter() this way can lead to unexpected consequences, something which OP probably didn't realize (unless I'm missing something here)
– sleepycal
Mar 13 '14...