From: Rein Henrichs <reinh@...>
Date: 2010-06-07T09:45:05+09:00
Subject: Re: inject method of Array class

In addition to the previously mentioned difference between #methods and 
#instance_methods, #inject is actually a method on the Enumerable 
module, which is mixed into Array (and other classes that have #each). 
The Enumerable module is full of methods that can be used on "things 
that can enumerate themselves", like Arrays, Hashes and Sets.

-- 
Rein Henrichs
http://puppetlabs.com
http://reinh.com