content_for head tag doesn't work (ruby on rails) - 


<% content_for :head %>   <%= javascript_include_tag "http://code.jquery.com/jquery-latest.min.js" %> <% end %>

it doesn't work.

how insert html head tag?

thanks.

do have <%= yield :head %> inside <head> tag (probably in layouts/application.html.erb)? no? add :).


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