Introduction to Sinatra

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

To provide different responses to different requests - taking the user to different pages / down different paths, to update or access different information, depending on the different requests (GET, POST, DELETE, etc.)

2. How do you pass variables into the views?

You can pass in instance variables (without explicitly passing them through the :locals hash) or local variables (in which case you must explicitly use the :locals hash ex: erb(:index, :locals => {:example => example})

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

By using embedded ruby files (.erb) and placing all code you want to display within: <%= code_to_display %> and content you want to simply run within: <% code_to_run %>

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

Any and all data submitted by users comes in as a hash called "params"

5. What are params?

Params is a hash containing all information submitted by the client, via forms. They are available to be used in .erb files, as variables, ex: params[:example_param]