Intro_to_sinatra_check.md

Introduction to Sinatra

1. What is the purpose of the server file (routing)?

• The server file contains the routes for specific HTTP verbs, and determines what the client gets back with each request

2. How do you pass variables into the views?

• Two ways
  • Using an instance variable:

  get '/' do
    @ number = 100
    erb :index
  end
  

  • Using local variable:

  get '/' do
    number = 100
    erb (:index, :locals => {:number => number})
  end
  

3. How can we interpolate ruby into a view (html)?

• use ERB tags. To render use in the view use <%= RUBY_CODE %>
• To not render in the view, omit the equals sign: <% RUBY_CODE %>

4. In what format does data come in from a view/form? What do we call it

• data comes in as a hash. The hash is called params

5. What are params?

• params are key value pairs that contain information coming from the client through forms.
• They are stored per request, so they can change with each request that is made