abloom/applicantion_helper.rb

## applicantion_helper.rb
module ApplicationHelper
  def content_block(name, &block)
    override = yield(name)
    return override unless override.blank?

    return capture(block)
  end
end

## layout.html.erb
<html>
  <head>
    <title>
      <% content_block(:title) do %>
      Default Title
      <% end %>
    </title>
  </head>
  <body>
    <%= yield %>
  </body>
</html>

## page.html.erb
<% content_for(:title) do %>
Custom Title
<% end %>

Regular body content here will end up in the lone "yield" in the template
	module ApplicationHelper
	def content_block(name, &block)
	override = yield(name)
	return override unless override.blank?

	return capture(block)
	end
	end
	<html>
	<head>
	<title>
	<% content_block(:title) do %>
	Default Title
	<% end %>
	</title>
	</head>
	<body>
	<%= yield %>
	</body>
	</html>
	<% content_for(:title) do %>
	Custom Title
	<% end %>

	Regular body content here will end up in the lone "yield" in the template