"Night at the movies!" exercise from codecademy. I think this exercise was really useful and helpful. I felt like a real developer for about 10 minutes :-)

movielist.rb

movies  = {traffic:4, babe:1, memento:2}
#movies = Hash[:traffic, 4, :babe, 1, :memento, 2]

puts "Welcome to your Movie Database!"
puts "---What would you like to do?"
puts "---To add a movie type 'add'"
puts "---To update a movie type 'update'"
puts "-- Type 'display' to display all movies."
puts "---To delete a movie type 'delete'"

choice = gets.chomp.downcase

case choice 
when"add"
    puts "Please enter the name of the movie:"
    title =  gets.chomp.downcase.to_sym
    if movies[title].nil?
        puts "Please enter the rating (1 to 5)"
        rating = gets.chomp.to_i
        movies[title] = rating
    else
        puts "That movie already exists!"
    end
when "update"
    puts "Please enter the name of the movie:"
    title =  gets.chomp.downcase.to_sym
    if movies[title].nil?
        puts "That movie doesn't exist!"
    else
        puts "Please enter the rating (1 to 5)"
        rating = gets.chomp.to_i
        movies[title] = rating
    end
when "delete"
    puts "Please enter the name of the movie:"
    title =  gets.chomp.downcase.to_sym
     if movies[title].nil?
        puts "That movie doesn't exist!"
    else
        movies.delete(title)
        puts "Movie deleted!"
    end
when "display"
    movies.each do |x,y|
        puts "#{x}: #{y}"
    end
else
    puts "Error!"
end

movies.each do |x,y|
    puts #{x}: #{y}
end