Ruby 2.2.2 ri文档

Question

I'm starting to learn Ruby, so I installed Ruby 2.2.2 via Macports. I understand that the ri documentation does not install by default, so I want to generate it. I read a few questions/answers on SO and came up with this:

gem install rdoc-data

rdoc-data --install

and was told: Your ruby version 2.2.2 is not supported, only 1.8.7, 1.9.2, 1.9.3, 2.0.0

How do I get the ri documentation for 2.2.2? Is there another method?

Answer 1

If you are using version 2.0 or the latest, and you use Ruby Installer for Windows then do the following:

In the command prompt and while you are in the Ruby installation folder, it is sufficient to type gem install rdoc-data in the command prompt. This results into generating rdocs in the folder named doc in the Ruby installation folder.

Instead of browsing online to check for API or documentations, you can just conveniently open the files in the doc folder. I know it is kind of against the teaching of most books and tutorials for Ruby, but keep it in mind that you just generated an API in your hard-drive and you do not have to use ri in the command prompt. You can just have the API open the entire time while coding.