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difference and when to use getApplication(), getApplicationContext(), getBaseContext() and someClass

I'm new to android and I'm trying to understand the difference between getApplication() , getApplicationContext( ), getBaseContext() , getContext() and someClass.this and especially when to use the these methods in the following code lines: ...
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JdbcTemplate queryForInt/Long is deprecated in Spring 3.2.2. What should it be replaced by?

The queryforInt/queryforLong methods in JdbcTemplate are deprecated in Spring 3.2. I can't find out why or what is considered the best practice to replace existing code using these methods. ...
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How to form tuple column from two columns in Pandas

I've got a Pandas DataFrame and I want to combine the 'lat' and 'long' columns to form a tuple. 4 Answers ...
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nil detection in Go

I see a lot of code in Go to detect nil, like this: 6 Answers 6 ...
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Pandas DataFrame Groupby two columns and get counts

I have a pandas dataframe in the following format: 6 Answers 6 ...
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How can I do DNS lookups in Python, including referring to /etc/hosts?

dnspython will do my DNS lookups very nicely, but it entirely ignores the contents of /etc/hosts . 6 Answers ...
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Closing WebSocket correctly (HTML5, Javascript)

I am playing around with HTML5 WebSockets. I was wondering, how do I close the connection gracefully? Like, what happens if user refreshes the page, or just closes the browser? ...
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How to edit a node module installed via npm?

I'm using the node_swiz module, which in turn uses the validator module. 5 Answers 5 ...
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Maven project.build.directory

In Maven, what does the project.build.directory refer to? I am a bit confused, does it reference the source code directory or the target directory in the Maven project? ...
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C# version of java's synchronized keyword?

Does c# have its own version of the java "synchronized" keyword? 5 Answers 5 ...