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How do you rotate a two dimensional array?

...eed this information in our function to rotate a matrix, so let’s add it now: def rotate(matrix): size = len(matrix) # Rotatable layers only. layer_count = size / 2 Now we know what layers are and how to determine the number of layers that actually need rotating, how do we isolate a...
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How do I add 24 hours to a unix timestamp in php?

I would like to add 24 hours to the timestamp for now. How do I find the unix timestamp number for 24 hours so I can add it to the timestamp for right now? ...
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Recursively add files by pattern

...ot already be tracked. If you want to limit yourself to files git already knows about, you could combine git-ls-files with a filter: git ls-files [path] | grep '\.java$' | xargs git add Git doesn't provide any fancy mechanisms for doing this itself, as it's basically a shell problem: how do you get...
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Testing modules in rspec

...ules in rspec? I have some modules that get included in few models and for now I simply have duplicate tests for each model (with few differences). Is there a way to DRY it up? ...
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How to print time in format: 2009‐08‐10 18:17:54.811

... It's an even better answer now, and props for looking up how to handle the millisecond part. I think your buffer is now a little longer than it needs to be, though. – Jack Kelly Sep 9 '10 at 3:56 ...
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What are the differences between django-tastypie and djangorestframework? [closed]

... @Mutant - Thanks, the djangocon.eu 2011 site is now dead, but I've linked directly to the video on blip.tv. – Tom Christie Oct 9 '12 at 13:44 ...
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Why is January month 0 in Java Calendar?

...ng what's wrong with it would take a very long time (and I'm sure I don't know half of the problems). Admittedly working with dates and times is tricky, but aaargh anyway. Do yourself a favour and use Joda Time instead, or possibly JSR-310. EDIT: As for the reasons why - as noted in other answers,...
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How to define custom configuration variables in rails

... Update 1 Very recommended: I'm going with Rails Config gem nowadays for the fine grained control it provides. Update2 If you want a quick solution, then check Jack Pratt's answer below. Although my original answer below still works, this answer is now outdated. I recommend looking...
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How to profile methods in Scala?

...noTime() println("Elapsed time: " + (t1 - t0) + "ns") result } // Now wrap your method calls, for example change this... val result = 1 to 1000 sum // ... into this val result = time { 1 to 1000 sum } share ...
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why does DateTime.ToString(“dd/MM/yyyy”) give me dd-MM-yyyy?

... Escaping the format string using backslash does also work: DateTime.Now.ToString("dd\\/MM\\/yyyy"); – TomB Jan 30 '15 at 8:42  |  show ...