From: James Britt <james_b@...>
Date: 2005-09-04T21:56:06+09:00
Subject: Re: ruby / rails newbie - Finding documentation in RDocs

steveH wrote:
> Hi, I'm brand new to ruby, to which I've been attracted by rails (along
> with many others, no doubt). I'm trying to hack together my first rxml
> template, but my first dip into the rdocs is a total failure. I see
> code like this...
> 
>   <% for column in Product.content_columns %>
>     <th><%= column.human_name %></th>
>   <% end %>
> 
> but I can't find a description of class Column anywhere - can't see it
> in rails docs, core ruby docs, MySQL/Ruby docs - have I just missed it
> or is it somewhere else, or isn't it a class at all but some sort of
> dynamic ruby magic which I've totally misunderstood...
> 

In the construct

   for x in some.collection
     ...
   end

x is a variable that takes on the file of each successive item in 
collection.

See

http://www.ruby-doc.org/docs/ProgrammingRuby/html/tut_containers.html

and, in general,

http://www.ruby-doc.org/docs/ProgrammingRuby/
http://www.ruby-doc.org/gettingstarted/


James


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