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What is the difference between `after_create` and `after_save` and when to use which?
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93
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What is the difference between include and extend in Ruby?
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332
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Which regular expression operator means 'Don't' match this character?
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80
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python numpy machine epsilon
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note that numpy's standard accuracy is 64 (in a 64 bit computer): >>> print(np.finfo(np.float).eps) = 2.22044604925e-16 and >>> print(np.finfo(np.float64).eps) = 2.22044604925e-16
– Charlie Parker
Nov 1 '17 at 17:24
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How to open files relative to home directory
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123
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Is there a template engine for Node.js? [closed]
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53
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Foreign keys in mongo?
... You can also get an introduction for free with this screencast codeschool.com/courses/rails-for-zombies
– Nerian
Jun 13 '11 at 18:11
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Why do table names in SQL Server start with “dbo”?
...est practice, but I could be wrong as I'm not a SQL expert. stackoverflow.com/a/769639/602245
– Brett
Jan 20 '12 at 19:19
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Why is the standard session lifetime 24 minutes (1440 seconds)?
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One reference to PHP4 default settings: github.com/php/php-src/blob/PHP-4.0/ext/session/session.c
– CXJ
Aug 11 '17 at 17:44
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