ri

This question already has an answer here : Why does my Ruby 'ri' tool not return results in command prompt? [duplicate] (1 answer) Is there a way to find out which part of my ri command that is not showing Ruby's documentation: $ ruby --version ruby 1.9.3p392 (2013-02-22 revision 39386) [i686-linux] $ ri --version ri 3.12.2 $ ri String Nothing known about String When I use pry: $ pry --version Pry version 0.9.12 on Ruby 1.9.3 $ pry [1] pry(main)> ri String # shows String documentation [2] pry(main)> ri String.split error: 'String.split' not found [3] pry(main)> ri String.strip String.strip not

Possible Duplicate: ruby 1.9 ri problem When I try to use Ruby's ri tool in a command prompt window to get help about classes, methods, etc. it seems to always fail. For example if I type: ri Array I get a message saying: Updating class cache with 0 classes... Nothing known about Array I am using Vista 64 with Ruby 1.9.1p243 (2009-07-16 revision 24175) [i386-mingw32] installed. What should I do to configure ri to work? Although this question is old, nobody has yet provided a proper solution. I just ran into the same issue, and found the solution: If you are using RVM : rvm docs generate-ri # <

I have just installed the RVM and I am reading The Well-Grounded Rubyist book. In the first chapter I am supposed to try ri String#upcase to view documentation on the upcase method, however I get a message saying: Nothing known about String#upcase I found some posts here on SO telling me that it probably is because RDoc is not installed. However I do not understand how to fix it. I am using Mac OSX 10.6, and latest RVM. I have only installed 1.9.2, in addition to the standard Ruby interpreter which come along with the Developer kit from Apple. Casper Did you generate the docs? rvm docs