accessing ruby standard library documentation locally

In your terminal, you can use ri to print specific parts of the documentation. (Note that if you're using RVM to manage your ruby installation(s), you may need to run rvm docs generate to avoid getting "Nothing known about...." responses)

For example:

> ri Array#drop

would output:

------------------------------------------------------------- Array#drop     ary.drop(n)               => array------------------------------------------------------------------------     Drops first n elements from _ary_, and returns rest elements in an     array.        a = [1, 2, 3, 4, 5, 0]        a.drop(3)             # => [4, 5, 0]

Several options:

• Local, searchable Rails and Ruby docs (options to add other docs like haml, rspec, rack, etc., but not quite up-to-date)
• Create from source
• ri
• ... and a million tools to generate snazzy docs from Ruby source, including...
• doc, which generates local searchable docs of whatever you tell it to; I'm digging it

Devdocs does the job

• it works (also) offline
• it is not limited to the ruby doc ;)

Clone the repo from github:

git clone git@github.com:Thibaut/devdocs.gitcd devdocs

Install dependencies:

gem install bundlerbundle install

download the docs:

thor docs:download --all

Run it:

rackup

It's accessible by default at http://localhost:9292