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nfm has asked 44 questions and find answers to 26 problems.

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nfm questions

Should I prevent record editing using a filter in my controller or a callback in my model?
How can I optimize querying this data in postgresql?
How do I pass an array to fields_for in Rails?
How do I write a function as both an event handler and a callable function that takes an argument?
Is it possible to create multiple Chrome Hosted Apps for the same domain?
Rails: How do I define an association extension in a module that gets included in my AR model?
Is there a good way to test `before_validation` callbacks with an `:on` argument in Rails?
What's the 'Ruby way' to iterate over an array - from array[n] to array[n - 1]?
Filename completion in vim with xterm doesn't work as expected
Is there a Rails way to check which attributes have been updated in an observer?

nfm answers

Creating a different "genre" of my website (i.e., I have a stackoverflow-equivalent and I want to create a serverfault-equivalent)
Ruby on Rails: Skipping 'validate_on_create' statement for seeds
Wrapping <%= f.check_box %> inside <label>
Rails3 button_to is calling POST action, trying to call PUT action
Problem with Rails 3 and MySQL related to JSON dependency in ActiveSupport
activerecord sum returns a string?
How do I freeze gems into a Rails 3 application?
Is it possible to have Haml indent HTML generated by a view helper in Rails?
How do I upgrade from Rails 2.3.5 to Rails 2.3.8?
PDFkit doesn't display pictures in PDF