Rails%203%20In%20Action

First steps
Then enter the following code in app/views/layouts/application.html.erb where the
title tag currently is.
Listing 3.23 app/views/layouts/application.html.erb
In Ruby, instance variables that aren’t set return nil as their values. If you try to access
an instance variable that returns a nil value, you can use || to return a different
value, as in this example.
With this in place, your step passes when you run rake cucumber:ok:
And I should see "TextMate 2 - Projects - Ticketee"
With this scenario now passing, you can change your code and have a solid base to
ensure that whatever you change works as you expect. To demonstrate this point,
change the code in show to use a helper instead of setting a variable.
Helpers are methods you can define in the files inside app/helpers, and they are
made available in your views. Helpers are for extracting the logic from the views, as
views should just be about displaying information. Every controller that comes from
the controller generator has a corresponding helper, and another helper exists for
the entire application. Now open app/helpers/application_helper.rb and insert the
code from the following listing.
Listing 3.24 app/helpers/application_helper.rb
module ApplicationHelper
def title(*parts)
unless parts.empty?
content_for :title do
(parts