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Active Support – Utility classes and Ruby extensions from Rails

Active Support is a collection of utility classes and standard library extensions that were found useful for the Rails framework. These additions reside in this package so they can be loaded as needed in Ruby projects outside of Rails.

Download and installation

The latest version of Active Support can be installed with RubyGems:

% [sudo] gem install activesupport

Source code can be downloaded as part of the Rails project on GitHub


Active Support is released under the MIT license.


API documentation is at

Bug reports and feature requests can be filed with the rest for the Ruby on Rails project here:

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