Week 5 Diagnostic

* When and why would you rebase?
If you had multiple small commits that awere all related and had not yet pulled from a portion of the repository that was shared (i.e. master after the original branch).

* What are the steps to do a basic rebase via the command line?
git rebase -i HEAD~somenumber

* Our cart in Little Shop is not stored in the database. How does its state persist across requests?
Cart is stored in a session, which then gets updated as items are added, etc.

* Name two objects used in Rails that can be used to track state of the user across requests.
Cookies, sessions. 

* Draw the MVC model and the request response cycle through a rails app.
request _____ router _______  some controller 
                              ||          ||
                             view        model
                                          ||
                                          DB

* Give an example of something you'd use a Rails helper for.
To perform a series of actions related to a task, but not inherently belonging to a controler. E.g. sending a confirmation email.

* How can we clean up duplicated code in the views?
_partials

* What type of variable is automatically available in a partial?
Instance variables.

* If you want to use a local variable in a partial, what syntax is used?
<%= render partial: "partial_name", locals: {name_in_view: name_in_controller}

* Describe the function and duties of the asset pipeline.
To pull all JS, CSS, and Images into a place where rails can access them. It also collates, minifies, and processes files, including SASS and Coffeescript.

* Give an example of an unacceptable use of a callback in Rails.
Sending an email after completing an action. Changing some related object instead of the object that's the subject of the controller.