Welcome to the Treehouse Community
Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.
Looking to learn something new?
Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.
Start your free trialQuanton poulo
6,361 PointsI can't figure out why I am getting this error, Please Help!!
shoppinglist.rb:34:in +': no implicit conversion of nil into String (TypeError)
from shoppinglist.rb:34:in
block in print_list'
from shoppinglist.rb:33:in each'
from shoppinglist.rb:33:in
print_list'
from shoppinglist.rb:47:in `<main>'
My code:
def create_list
print "List name: "
name = gets.chomp
hash = {"name" => name, "item" => Array.new}
return hash
end
def add_items
print "Item name: "
item_name = gets.chomp
print "Quantity: "
quantity = gets.chomp.to_i
hash = { "item" => item_name, "quantity" => quantity }
return hash
end
def print_list(list)
puts "List: #{list['name']}"
list["item"].each do |item| puts "Item: " + item['name'] puts "Quantity: " + item['quantity'].to_s
end
end
list = create_list list['item'].push(add_items) print_list(list)
1 Answer
Bryan Saylor
22,900 PointsI'm seeing several things why your code may not be working. I think you should use different variable names for the different code blocks so it does not get confusing. Here is my code I had in my workspace
def create_list print "What is the list name? " name = gets.chomp
hash = { "name" => name, "items" => Array.new } return hash end
notice instead of item I have items
so when I use the .each method item is singular not plural
def print_list(list) puts "list: #{list['name']}" print_separator()
list["items"].each do |item|
puts "\tItem: " + item['name'] + "\t\t\t" +
"Quantity: " + item['quantity'].to_s
end
print_separator()
end
And then for the Add Item function I have use name in the hash instead of items:
def add_list_item print "What is the item called? " item_name = gets.chomp
print "How much? " quantity = gets.chomp.to_i
hash = { "name" => item_name, "quantity" => quantity } return hash end
Hope that helps!