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How to implement a unique index on two columns in rails
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Run javascript function when user finishes typing instead of on key up?
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Generate random numbers with a given (numerical) distribution
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How can I change the copyright template in Xcode 4?
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What is the difference between origin and upstream on GitHub?
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How can I filter a Django query with a list of values?
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How can I see the current value of my $PATH variable on OS X?
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What is the difference between syntax and semantics in programming languages?
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What is the difference between os.path.basename() and os.path.dirname()?
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