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Get top n records for each group of grouped results

...g is the simplest possible example, though any solution should be able to scale to however many n top results are needed: 1...
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Cannot find module cv2 when using OpenCV

I have installed OpenCV on the Occidentalis operating system (a variant of Raspbian) on a Raspberry Pi, using jayrambhia's script found here . It installed version 2.4.5. ...
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Pass parameters in setInterval function

Please advise how to pass parameters into a function called using setInterval . 15 Answers ...
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Where does Oracle SQL Developer store connections?

I have an application that I can't get connected to my Oracle Database 11g Express Edition. I created a test database in this edition, and I can connect to the database fine using Oracle SQL Developer, create tables, views etc. However, I'm having a hard time getting connected via my application. Wh...
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Where does mongodb stand in the CAP theorem?

Everywhere I look, I see that MongoDB is CP. But when I dig in I see it is eventually consistent. Is it CP when you use safe=true? If so, does that mean that when I write with safe=true, all replicas will be updated before getting the result? ...
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How do I paste multi-line bash codes into terminal and run it all at once?

I need to paste a multi-line bash code into terminal, but whenever I do, each line gets run as a separate command as soon as it gets pasted. ...
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Determine the path of the executing BASH script [duplicate]

In a Windows command script, one can determine the directory path of the currently executing script using %~dp0 . For example: ...
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Hidden features of Scala

What are the hidden features of Scala that every Scala developer should be aware of? 28 Answers ...
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Declaring variables inside loops, good practice or bad practice?

Question #1: Is declaring a variable inside a loop a good practice or bad practice? 6 Answers ...
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How do I use vim registers?

I only know of one instance using registers is via Ctrl R * whereby I paste text from a clipboard. 16 Answers ...