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#28 in_groups_of

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Have you ever wanted to visually line up items in rows and columns? The in_groups_of method makes this a cinch. Just watch out for the gotcha.
<!-- tasks/index.rhtml -->
<table>
<% @tasks.in_groups_of(4, false) do |row_tasks| %>
  <tr>
    <% for task in row_tasks %>
      <td><%= task.name %></td>
    <% end %>
  </tr>
<% end %>
</table>
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