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Where should Rails 3 custom validators be stored?

I've seen docs/websites show that custom validators should go in a /lib or /lib/validators directory of a project. I've found (by reading an answer to another post) that they only seem to work in config/initializers . Does anyone know, or have a pointer to official documentation that shows wher...
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What is the difference between Directory.EnumerateFiles vs Directory.GetFiles?

What is the difference between Directory.EnumerateFiles vs GetFiles ? 3 Answers 3 ...
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Getting value of public static final field/property of a class in Java via reflection

Say I have a class: 3 Answers 3 ...
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How to convert CharSequence to String?

How can I convert a Java CharSequence to a String ? 3 Answers 3 ...
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Saving grid.arrange() plot to file

... multiple plots using ggplot2 , arranging them using grid.arrange() . Since I managed to find someone describing the exact problem I have, I have quoted from the problem description from link : ...
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How to get a reference to a module inside the module itself?

How can I get a reference to a module from within that module? Also, how can I get a reference to the package containing that module? ...
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JPQL IN clause: Java-Arrays (or Lists, Sets…)?

I would like to load all objects that have a textual tag set to any of a small but arbitrary number of values from our database. The logical way to go about this in SQL would be to build an "IN" clause. JPQL allows for IN, but it seems to require me to specify every single parameter to IN directly (...
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GitHub - List commits by author

Is there any way on GitHub to list all commits made by a single author, in the browser (neither locally, e.g. via git log , nor via the API)? ...
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How do I convert an integer to string as part of a PostgreSQL query?

How do I convert an integer to string as part of a PostgreSQL query? 3 Answers 3 ...
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Differences between Microsoft .NET 4.0 full Framework and Client Profile

The Microsoft .NET Framework 4.0 full installer (32- and 64-bit) is 48.1 MB and the Client Profile installer is 41.0 MB. The extracted installation files are 237 MB and 194 MB respectively, and once installed, they are 537 MB and 427 MB. ...