ruby_methods_challenges.rb

items = [{ customer: "John", item: "Soup", cost: 8.50}, {customer: "Sarah", item: "Pasta", cost: 12}, {customer: "John", item: "Coke", cost: 2.50}]

puts "whats your name?"
customer = gets.chomp

filter = items.select do |item|
    item[:customer] == customer
end 
cost = filter.map do |item|
    item[:cost]
end 
result = cost.sum
p "#{customer} owes $#{result}" 

# this is a really nice challenge for working with select and map 
# need to select only the items that contain the name and then just take the cost items out of that array