From: tamouse mailing lists <tamouse.lists@...>
Date: 2013-05-11T04:50:35+09:00
Subject: Re: What is module in Ruby? Is there any standard (any strict rules) to define module?

On Fri, May 10, 2013 at 2:15 PM, Wins Lin <lists@ruby-forum.com> wrote:
> What is a module in Ruby?
>
> For now I can't see any standard that could help me to define a module.
>
> They say that "a module == a directory". But that's not true.
> In Rails they define modules just as they want. Some are bound with a
> directory with the same name, others are just plain files.
>
> E.g. in ActiveRecord there is a line:
>>> autoload :SessionStore
>
> So session_store has to be:
> 1) a module
> 2) a directory with the same name (/session_store/*)
>
> But session_store is:
> 1) a class
> 2) and a simple file, no any directory.
>
> And there are many more similar examples.
>
> So where is the standard of module definition in Ruby? What are the
> rules?
>
> --
> Posted via http://www.ruby-forum.com/.
>

In Ruby, very simply, a Module defines a scope and a namespace. But
that is hugely simplistic. I highly recommend reading "Metaprogramming
Ruby" for some real insight on this, as well as the good old pickaxe
book.

There are many fine additional references at the end of
https://duckduckgo.com/?q=what+is+a+ruby+module%3F