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Warning the user/local/mysql/data directory is not owned by the mysql user

....mysqld</string> <key>ProgramArguments</key> <array> <string>/usr/local/mysql/bin/mysqld_safe</string> <string>--user=mysql</string> </array> </dict> </plist> Save it and then: sudo chown root:whee...
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Are PHP Variables passed by value or by reference?

...ass by reference has some performance benefits or not? I'm passing a large array & by default it is pass by value. So, if I use call by reference then, will there be some performance wise benefit??? (keeping the array values unchanged during the whole process) – Choxx ...
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How do I use the includes method in lodash to check if an object is in the collection?

...17.5, without using _.includes(): Say you want to add object entry to an array of objects numbers, only if entry does not exist already. let numbers = [ { to: 1, from: 2 }, { to: 3, from: 4 }, { to: 5, from: 6 }, { to: 7, from: 8 }, { to: 1, from: 2 } // intentionally added d...
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In C++, what is a virtual base class?

... wrong? Imagine: A has some basic feature. B adds to it some kind of cool array of data (for example) C adds to it some cool feature like an observer pattern (for example, on m_iValue). D inherits from B and C, and thus from A. With normal inheritance, modifying m_iValue from D is ambiguous and th...
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Environment variables in Mac OS X

...aunchd.conf</string> <key>ProgramArguments</key> <array> <string>sh</string> <string>-c</string> <string>launchctl < ~/.launchd.conf</string> </array> <key>RunAtLoad</key> <true/> &lt...
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Split string with delimiters in C

How do I write a function to split and return an array for a string with delimiters in the C programming language? 20 Answe...
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Linq select objects in list where exists IN (A,B,C)

... I would say that use HashSet instead of array for allowedStatus because HashSet's contains method is fastest and there'll be performance issues with array if it contains more than 1000 items. var allowedStatus = new HashSet<string> { "A", "B", "C" }; ...
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Detect when browser receives file download

...processing=true; while($processing){ $_SESSION['downloadstatus']=array("status"=>"pending","message"=>"Processing".$someinfo); session_write_close(); $processing=do_what_has_2Bdone(); session_start(); } $_SESSION['downloadstatus']=array("status"=>"finis...
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What's the difference between the four File Results in ASP.NET MVC

... for all the others. FileContentResult - you use it when you have a byte array you would like to return as a file FilePathResult - when you have a file on disk and would like to return its content (you give a path) FileStreamResult - you have a stream open, you want to return its content as a file...
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When should I use the HashSet type?

...anges, this will never be more appropriate than simply... string[]: Again, Array.BinarySearch gives O(log n) performance. If the list is short, this could be the best performing option. It always has less space overhead than HashSet, Dictionary, or List. Even with BinarySearch, it's not faster for l...