> New: <%= yield(:title) %>
> Old: <%= @title %>
@title is set in a controller, and to separate views from what goes on
in a controller, you shouldn't set a title of an html page in a
controller. The method yield(:title) looks for the value of a title
variable in the view, which can be set like this:
<% provide(:title, "Home") %>
> New: "#{base_title} | Home"
> Old: @base_title + "| Home"
Those statements do the exact same thing in ruby. The first example
injects a second string into the first string. The second example joins
two strings together--producing a third string. So the second example is
a tiny bit more efficient.
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