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Many-to-many relationship with the same model in rails?

How can I make a many-to-many relationship with the same model in rails? 6 Answers 6 ...
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Find all controls in WPF Window by type

I'm looking for a way to find all controls on Window by their type, 17 Answers 17 ...
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Use of class definitions inside a method in Java

...ss. 2 is the easy one: yes, a class file will be generated. 1 and 3 are kind of the same question. You would use a local class where you never need to instantiate one or know about implementation details anywhere but in one method. A typical use would be to create a throw-away implementation of ...
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Batch file to delete files older than N days

I am looking for a way to delete all files older than 7 days in a batch file. I've searched around the web, and found some examples with hundreds of lines of code, and others that required installing extra command line utilities to accomplish the task. ...
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error: ‘NULL’ was not declared in this scope

I get this message when compiling C++ on gcc 4.3 6 Answers 6 ...
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Where does the @Transactional annotation belong?

Should you place the @Transactional in the DAO classes and/or their methods or is it better to annotate the Service classes which are calling using the DAO objects? Or does it make sense to annotate both "layers"? ...
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In Matplotlib, what does the argument mean in fig.add_subplot(111)?

... These are subplot grid parameters encoded as a single integer. For example, "111" means "1x1 grid, first subplot" and "234" means "2x3 grid, 4th subplot". Alternative form for add_subplot(111) is add_subplot(1, 1, 1). ...
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Running Selenium WebDriver python bindings in chrome

I ran into a problem while working with Selenium. For my project, I have to use Chrome. However, I can't connect to that browser after launching it with Selenium. ...
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Is Dvorak typing appropriate for programming? [closed]

I'm always looking for ways to be more productive, and I've been reading a lot about typing using a Dvorak keyboard. 12 A...
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What is “assert” in JavaScript?

What does assert mean in JavaScript? 14 Answers 14 ...