ri: Ruby Interactive documentation

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Jan 5 ’12

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ri: Ruby Interactive documentation

ri stands for “Ruby Interactive” and provides documentation on Ruby itself and most gems. You access it from the command line.

Here are some samples:

ri Array
ri select
ri Hash#select
ri Array#select
ri ActiveRecord::Base
ri -l #lists all classes with ri docs

(If you want to access the RDoc documentation, there’s a tip for that, too: Easy Access to the API Docs for Gems.)

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