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Rails :include vs. :joins

... | edited Dec 10 '14 at 19:26 pjam 6,13544 gold badges2727 silver badges3636 bronze badges answer...
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Cron job every three days

... that? If you want it to run on specific days of the month, like the 1st, 4th, 7th, etc... then you can just have a conditional in your script that checks for the current day of the month. if (((date('j') - 1) % 3)) exit(); or, as @mario points out, you can use date('k') to get the day of the...
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Center a column using Twitter Bootstrap 3

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How to delete items from a dictionary while iterating over it?

...over it: >>> mydict = {'one': 1, 'two': 2, 'three': 3, 'four': 4} >>> for k, v in mydict.iteritems(): ... if k == 'two': ... del mydict[k] ... ------------------------------------------------------------ Traceback (most recent call last): File "<ipython console&gt...
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When should I use mmap for file access?

... patryk.beza 3,88655 gold badges3232 silver badges4747 bronze badges answered Nov 3 '08 at 8:01 Don NeufeldDon Neufeld 20.8k1010...
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Best design for a changelog / auditing database table? [closed]

... answered Nov 19 '08 at 15:41 YarikYarik 2,08922 gold badges2222 silver badges2929 bronze badges ...
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SQL Server IN vs. EXISTS Performance

... 141 EXISTS will be faster because once the engine has found a hit, it will quit looking as the cond...
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Searching subversion history (full text)

... answered Sep 29 '10 at 10:24 luis gutierrezluis gutierrez 89677 silver badges22 bronze badges ...
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Adding hours to JavaScript Date object?

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How does tuple comparison work in Python?

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