From: Brian Palmer <rubytalk@...>
Date: 2006-08-02T13:59:51+09:00
Subject: Re: Rails view template for a gallery

How about using Enumerator#each_slice (or Rails' #in_groups_of):

<html>
   <body>
     <h1><%= @gallery.name -%></h1>
     <table>
       <% @gallery.each_slice(4) do |slice| %>
       <tr>
         <% slice.each do |image| %>
           <td><%= image_tag(image) %></td>
         <% end %>
       </tr>
       <% end %>
     </table>
   </body>
</html>

-- Brian

On Aug 1, 2006, at 10:45 PM, Matt Todd wrote:

> I'll be honest, I think this is Ruby-centric enough because it really
> comes down to basic looping and Erb, so I'll take a stab at it!
>
> <html>
>  <body>
>    <h1><%= @gallery.name -%></h1>
>    <table>
>      <% ((@gallery.length / 4) + (((@gallery.length % 4) > 0) ? 1 :
> 0)).downto(1) do %>
>        <tr>
>          <% 4.downto(1) do %>
>            <td><img src='<%= @gallery.shift -%>'></td>
>          <% end %>
>        </tr>
>      <% end %>
>    </table>
>  </body>
> </html>
>
> That basically figures out how many rows (based on the length divided
> by 4, plus 1 if there were any leftovers) and then loops through them.
> Then, for each row, we loop four times and for each iteration, we
> shift off the front element to go from beginning to end (instead of
> pop, which will pull if off the end).
>
> I like this solution a bit better because it uses a very heirarchical
> structure much like the way the data will be. Plus, I don't have to
> embed any HTML into Erb!
>
> Hope this helps,
>
> M.T.
>