rubyonrailsin

I have an hash of display names and their corresponding object
attribute names called @columns.
As I iterate through @columns, what is the syntax for accessing the
attribute of the object using c? I get an error on the 4th line.

<% for c in @columns["object_"+@object.categorie] do %>
<tr>
<td class="name"><%=c.first%></td>
<td><%= @object.c.second %></td>
</tr>

<% end %>

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