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How do you write a migration to rename an ActiveRecord model and its table in Rails?

I'm terrible at naming and realize that there are a better set of names for my models in my Rails app. Is there any way to use a migration to rename a model and its corresponding table? ...
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Are class names in CSS selectors case sensitive?

I keep reading everywhere that CSS is not case sensitive, but I have this selector 4 Answers ...
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When to add what indexes in a table in Rails

I have a question about Rails database. 3 Answers 3 ...
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Greenlet Vs. Threads

I am new to gevents and greenlets. I found some good documentation on how to work with them, but none gave me justification on how and when I should use greenlets! ...
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Difference between CC, gcc and g++?

What are the difference between the 3 compilers CC, gcc, g++ when compiling C and C++ code in terms of assembly code generation, available libraries, language features, etc.? ...
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Is GridFS fast and reliable enough for production?

I develop a new website and I want to use GridFS as storage for all user uploads, because it offers a lot of advantages compared to a normal filesystem storage. ...
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How does git compute file hashes?

The SHA1 hashes stored in the tree objects (as returned by git ls-tree ) do not match the SHA1 hashes of the file content (as returned by sha1sum ) ...
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String.format() to format double in java

How can I use String.format(format String,X) to format a double like follows??? 7 Answers ...
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Is it safe to remove selected keys from map within a range loop?

How can one remove selected keys from a map? Is it safe to combine delete() with range, as in the code below? 4 Answers ...
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SVN how to resolve new tree conflicts when file is added on two branches

When merging a couple of branches (using SVN 1.6.1) where a file has been added on both branches (and then worked on in those separate branches) I'm getting one of the new tree conflicts: ...