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What is the difference D3 datum vs. data?

Can someone please explain the difference between datum() and data() in D3.js? I see both being used and I am not sure why you should choose one over the other? ...
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How do you create nested dict in Python?

I have 2 CSV files: 'Data' and 'Mapping': 4 Answers 4 ...
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Creating a dynamic choice field

I'm having some trouble trying to understand how to create a dynamic choice field in django. I have a model set up something like: ...
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How does HTTP file upload work?

When I submit a simple form like this with a file attached: 5 Answers 5 ...
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How to express a NOT IN query with ActiveRecord/Rails?

Just to update this since it seems a lot of people come to this, if you are using Rails 4 look at the answers by Trung Lê` and VinniVidiVicci. ...
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Create a list from two object lists with linq

I have the following situation 8 Answers 8 ...
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Intellij IDEA, format all code in a project

I really like IDEA's code formatting, but how do I get it to reformat all the code in a particular project without going through each file? I've found the option to tidy / optimise imports on code before committing it to subversion which is great, but it only seems to apply to files that have otherw...
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Unable to show a Git tree in terminal

Killswitchcollective.com's old article, 30 June 2009 , has the following inputs and outputs 6 Answers ...
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How to convert a string to lower case in Bash?

Is there a way in bash to convert a string into a lower case string? 20 Answers 20 ...
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Running shell command and capturing the output

I want to write a function that will execute a shell command and return its output as a string , no matter, is it an error or success message. I just want to get the same result that I would have gotten with the command line. ...