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SQL select only rows with max value on a column [duplicate]

I have this table for documents (simplified version here): 27 Answers 27 ...
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How do JavaScript closures work?

How would you explain JavaScript closures to someone with a knowledge of the concepts they consist of (for example functions, variables and the like), but does not understand closures themselves? ...
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Ruby class instance variable vs. class variable

I read " When do Ruby instance variables get set? " but I'm of two minds when to use class instance variables. 7 Answers ...
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Find a string by searching all tables in SQL Server Management Studio 2008

Is there any way to search for a string in all tables of a database in SQL Server Management Studio 2008? 8 Answers ...
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Print Var in JsFiddle

How would I print something to the result screen in JsFiddle from my JavaScript. I can't use document.write() , it doesn't allow it, neither print . ...
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Numpy matrix to array

I am using numpy. I have a matrix with 1 column and N rows and I want to get an array from with N elements. 9 Answers ...
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Difference between core and processor

What is the difference between a core and a processor? 6 Answers 6 ...
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Fastest way to check if a string is JSON in PHP?

I need a really, really fast method of checking if a string is JSON or not. I feel like this is not the best way: 30 Answer...
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How can I change the default Django date template format?

I have dates in ISO 8601 format in the database, %Y-%m-%d . However, when the date is passed on to the template, it comes out as something like Oct. 16, 2011 . ...
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Bash conditionals: how to “and” expressions? (if [ ! -z $VAR && -e $VAR ])

I guess I'm not clear on how to do "and" tests. I wanted to make sure an argument existed which was working well with [ -e $VAR ] , but it turns out that was also evaluating as true on an empty string; which I do not want. ...