From: Dustin Barker <dustin.barker@...>
Date: 2008-07-25T01:49:14+09:00
Subject: Re: Output an array as XML

Hi Chris,

>
> Im currently trying to do it with builder and have the following:

urls = ["http://www.google.com", "http://yahoo.com"]

> @sitemap = Builder::XmlMarkup.new()
> @sitemap.instruct!
> @sitemap.declare! :DOCTYPE, :html, :PUBLIC, "-//W3C//DTD XHTML 1.0
> Strict//EN", "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"

@sitemap.urlset can take a block as a parameter:

>
> @sitemap.urlset("xmlns" =>
> "http://www.sitemaps.org/schemas/sitemap/0.9")

it becomes:

@sitemap.urlset("xmlns" => "http://www.sitemaps.org/schemas/sitemap/ 
0.9") do |urlset|
   urls.each do |loc|
     urlset.url { |url| url.loc(loc) }
   end
end

The block argument 'urlset' is effectively the urlset tag and behaves  
the same way as @sitemap. The block that is passed to @sitemap.urlset  
can iterate the array of URLs and build the child nodes (also using  
blocks to build their children and so on).

-Dustin