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PostgreSQL - Rename database

I need to rename the database but when I do in PGAdmin : ALTER DATABASE "databaseName" RENAME TO "databaseNameOld" it told me that it cannot. ...
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What is the proper way to check for existence of variable in an EJS template (using ExpressJS)?

On the EJS github page, there is one and only one simple example: https://github.com/visionmedia/ejs 13 Answers ...
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How to read the database table name of a Model instance?

Given a model's instance object, how can I get the database table's name? 1 Answer 1 ...
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How is Generic Covariance & Contra-variance Implemented in C# 4.0?

I didn't attend PDC 2008, but I heard some news that C# 4.0 is announced to support Generic covariance and contra-variance. That is, List<string> can be assigned to List<object> . How could that be? ...
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Heatmap in matplotlib with pcolor?

I'd like to make a heatmap like this (shown on FlowingData ): 4 Answers 4 ...
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When should I use GC.SuppressFinalize()?

In .NET, under which circumstances should I use GC.SuppressFinalize() ? 5 Answers 5 ...
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What is the difference between Fragment and FragmentActivity?

My question is apart from the obvious inheritance differences, what are the main differences between Fragment and FragmentActivity ? To what scenarios are each class best suited? I'm trying to get an understanding of why both of these classes exist... ...
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Copy table without copying data

copies the table foo and duplicates it as a new table called bar . 4 Answers 4 ...
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How do I programmatically click a link with javascript?

Is there a way to click on a link on my page using JavaScript? 11 Answers 11 ...
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Objective-C class -> string like: [NSArray className] -> @“NSArray”

I am trying to get a string name of a class from the class object itself. 3 Answers 3 ...