Rails - Mar 2008 - check_box

I have one for loop as below

<% for knowledge_base in @knowledge_bases %>

   <td><%= check_box ("knowledge_base",
"selection",{},checked_value "1", unchecked_value =
"0" ) %></td>
   <%= hidden_field "knowledge_base_selected", "id",
"value" =>
knowledge_base.id %>
   <td><%= knowledge_base.keyword %></td>
</tr>
<%
end
%>

How can i get only the selected check box ids ie, hiddenfield
"knowledge_base_selected" "id"  in the controller?Will I get
it as array
in controller?

Sijo
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Hi
    Here I tried like following

<td><%= check_box :knowledge_base,  :index =>
"#{knowledge_base.id}"
%></td>

And in controller I get

index10index21index31index40        #If I selected 2,3 check boxes..What 
I need is  to extract 2,3 from this .How can I do this

Please help
Sijo
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