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Run a callback only if an attribute has changed in Rails

... 5.1+ info. – pdobb Jun 22 '18 at 4:06 add a comment  |  ...
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How to launch Safari and open URL from iOS app

... answered Sep 14 '12 at 0:06 TimTim 56.8k1818 gold badges153153 silver badges160160 bronze badges ...
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Explode PHP string by new line

...h. similar? – Larzan Sep 7 '15 at 8:06 18 You can't use PHP_EOL because the system and the input ...
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Restore the state of std::cout after manipulating it

... answered Feb 16 '10 at 14:06 whacko__Crackowhacko__Cracko 5,95066 gold badges3030 silver badges3434 bronze badges ...
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Best way to test if a row exists in a MySQL table

... test WHERE texte LIKE '%something%' LIMIT 1 with mysql_num_rows() : 0.039061069488525s. (FASTER) SELECT count(*) as count FROM test WHERE text LIKE '%something% : 16.028197050095s. SELECT EXISTS(SELECT 1 FROM test WHERE text LIKE '%something%') : 0.87045907974243s. SELECT EXISTS(SELECT 1 FROM tes...
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SQL Server: Query fast, but slow from procedure

... | edited Jun 7 '15 at 12:06 shA.t 14.6k55 gold badges4646 silver badges8989 bronze badges answered Jan ...
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How do I write output in same place on the console?

...s. – Diego Herranz Apr 17 '13 at 12:06 3 @Diego there's now a support library for curses module o...
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Android Notification Sound

... answered Apr 6 '13 at 20:06 James MVJames MV 7,8481212 gold badges5858 silver badges8686 bronze badges ...
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Where to find Java JDK Source Code? [closed]

... – Martijn Courteaux May 24 '10 at 12:06 3 ...
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How to read a (static) file from inside a Python package?

... [added 2016-06-15: apparently this doesn't work in all situations. please refer to the other answers] import os, mypackage template = os.path.join(mypackage.__path__[0], 'templates', 'temp_file') ...