Introduction to Sinatra

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

Take input from a client and figure out what to do with it (e.g. what to return, what to change on a server, what to delete, etc.)

2. How do you pass variables into the views?

ERB can reference an instance variable from the server file. Can also send variables as locals. In the code below the :number symbol in the :locals hash is what will be used in the erb template to reference the variable, number (not a symbol) references the number variable in the server file.

get '/' do
  number = 8
  erb(:index, :locals => {:number => number })
end

3. How can we interpolate ruby into a view (html)? Use use an erb template and send a message from within the server file using the erb function.

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

A hash called params.

5. What are params?

Parameters that can be accessed by the server file as a hash (e.g. params[:name])