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What are '$$' used for in PL/pgSQL

Being completely new to PL/pgSQL , what is the meaning of double dollar signs in this function : 2 Answers ...
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How can I tell Moq to return a Task?

I've got an interface which declares 4 Answers 4 ...
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What is the preferred syntax for initializing a dict: curly brace literals {} or the dict() function

I'm putting in some effort to learn Python, and I am paying close attention to common coding standards. This may seem like a pointlessly nit-picky question, but I am trying to focus on best-practices as I learn, so I don't have to unlearn any 'bad' habits. ...
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How do I specify a single test in a file with nosetests?

I have a file called test_web.py containing a class TestWeb and many methods named like test_something(). 6 Answers ...
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Where is the documentation for the values() method of Enum?

I declare an enum as : 3 Answers 3 ...
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Rails.env vs RAILS_ENV

I see both in examples when checking what env one is running in. What's preferred? Are they, for all intents and purposes equal? ...
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What's the difference between io.sockets.emit and broadcast?

What's the difference between io.sockets.emit and socket.broadcast.emit? Is it only that broadcast emits to everyone BUT the socket that sends it? ...
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Get current stack trace in Ruby without raising an exception

I want to log the current backtrace (stacktrace) in a Rails 3 app without an exception occurring. Any idea how? 3 Answers...
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Adding a y-axis label to secondary y-axis in matplotlib

I can add a y label to the left y-axis using plt.ylabel , but how can I add it to the secondary y-axis? 3 Answers ...
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How do you reference a capture group with regex find and replace in Visual Studio 2012, 2013, 2015,

... realize there are a ton of questions about this, but none that I found specifically referenced which VS version they referred to. With that important information lacking, I still was unable to successfully use the answers I found. The most common was ...