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Michael Koziarski http://www.koziarski.net/

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Iterating over a list

One of the common things you want to do with a table in a web application is use different classes so the rows have different styles. i.e alternate between light and dark backgrounds.

Arry#cycle is a method to enable that.

class Array
  def cycle(values)
    self.each_with_index do |o, i| 
      yield(o, values[i % values.length])
    end
  end
end


You can use it like this:

<% @something.cycle(["oddRow", "evenRow"]) do |obj, cssClass| %>
  <tr class="<%= cssClass %>">
    <td><%= obj.something %></td>
    <td><%= obj.something_else %></td>
  </tr>
<% end %>
to ruby rails css array table erb by koz on May 31, 2005 4 Comments
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