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Duplicate symbols for architecture x86_64 under Xcode

...estion with above title but have not found the right answer yet. I got the error: 51 Answers ...
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Throw an error in a MySQL trigger

If I have a trigger before the update on a table, how can I throw an error that prevents the update on that table? 7 An...
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Run php script as daemon process

... script! # Note, in this example, if your PHP script returns # the string "ERROR", the daemon will stop itself. script [ $(exec /usr/bin/php -f /path/to/your/script.php) = 'ERROR' ] && ( stop; exit 1; ) end script Starting & stopping your daemon: sudo service myphpworker start sud...
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Why is lazy evaluation useful?

...de" please? – Abdul Nov 8 '16 at 20:05 1 @Abdul, an example familiar to any ORM user: lazy associ...
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Rspec doesn't see my model Class. uninitialized constant error

...ts on Rspec for my models in Ruby on Rails application. And I receive this error while starting 'rspec spec' 7 Answers ...
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How can I specify the base for Math.log() in JavaScript?

... I've noticed some potential room for error here, probably having to do with floating point math. I just tried the function above with a value of 1000 in node, and got a result of 2.9999999999999996. (Although other numbers I tried, such as 10, 100, and even 1000...
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Where do I find the current C or C++ standard documents?

...n the standard (less useful - it contains several dangerous and misleading errors). The C99 and C++03 standards are available in book form from Wiley and the BSI (British Standards Institute): C++03 Standard on Amazon C99 Standard on Amazon Standards committee draft versions (free) The working...
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Rails: convert UTC DateTime to another time zone

... In irb, when I try Time.now.in_time_zone('CST'), I get the error "undefined method 'in_time_zone'". Are there rails classes that I need in order to get this to work? – Drew Johnson Apr 23 '10 at 2:59 ...
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Why won't my PHP app send a 404 error?

... @SuperCat thanks , now i reread the error and everything is clear now., – user1642018 Jan 6 '15 at 6:10 add a comment ...
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What do the result codes in SVN mean?

What do the result codes in SVN mean? I need a quick reference. 9 Answers 9 ...