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What does rake db:test:prepare actually do?

I am following the rails tutorial videos and I can't figure out what the db:test:prepare command actually does. Can someone provide an explanation? ...
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Appending to an empty DataFrame in Pandas?

Is it possible to append to an empty data frame that doesn't contain any indices or columns? 3 Answers ...
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Why do you not use C for your web apps?

I was having a look at a few different web servers this morning when I came across G-WAN . As I understand, its a web server written in C and you have to make use of it by writing your websites/webapps in C. One clear benefit is speed as the G-WAN site suggests. ...
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What's an object file in C?

I am reading about libraries in C but I have not yet found an explanation on what an object file is. What's the real difference between any other compiled file and an object file? I would be glad if someone could explain in human language. ...
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Is it safe to delete an object property while iterating over them?

When iterating over an object's properties, is it safe to delete them while in a for-in loop? 2 Answers ...
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Difference between “git checkout ” and “git checkout -​- ”

http://norbauer.com/notebooks/code/notes/git-revert-reset-a-single-file 2 Answers 2 ...
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SQL Server Management Studio SSMS tries to “save to file” instead of execute on F5

This happens intermittently and seems to be related to accidentally hitting a key. 2 Answers ...
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@Column(s) not allowed on a @ManyToOne property

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$apply vs $digest in directive testing

If I have a directive that responds to the status of a particular attribute on the scope, and I want to change that attribute in my test and verify that it responds correctly, which is the best way of doing that change? ...
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Where in an Eclipse workspace is the list of projects stored?

I use Eclipse with "external" projects - i.e. projects created from existing source. 6 Answers ...