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Editorial Team
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Asked: 2026-06-11T14:55:49+00:00

I see strange output in my pages when I use yield_content . Please see

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I see strange output in my pages when I use yield_content. Please see below.
Notice the [#<Proc:0x850a14c@/home/akonsu/project/index.erb:1>] part. What is this?

layout.erb:

<!DOCTYPE html>
<html>
  <head>
    <%= yield_content :head %>
  </head>
  <body>
    <%= yield %>
  </body>
</html>


index.erb:

<% content_for :head do %>
  <script type="text/javascript" src="/js/jquery.js"></script>
<% end %>
<div id="contents">
...
</div>


output:

<!DOCTYPE html>
<html>
  <head>
  <script type="text/javascript" src="/js/jquery.js"></script>
[#<Proc:0x850a14c@/home/akonsu/project/index.erb:1>]
  </head>
  <body>



<div id="contents">
...
</div>
</body>
</html>

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1 Answer

  1. Editorial Team

    this is because of <%=. In ruby 1.9 it should use <% instead.

    <% yield_content :head %>

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