Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

Ruby Ruby Loops Build a Simple Contact List Hash and Array Iteration

What's wrong with the program?

Using the each method, iterate over the contact_list array. Assign each array item to the local variable contact in the block and print out the value of the name and phone_number keys.

contact_list = [{"name" => "Jason", "phone_number" => "123"}, {"name" => "Nick", "phone_number" => "456"} ]

contact_list.each do |item| contact = item contact.each_value do |value| puts value end end ā€‹

contact_list.rb
contact_list = [
  {"name" => "Jason", "phone_number" => "123"},
  {"name" => "Nick", "phone_number" => "456"}
]

contact_list.each do |item|
  contact = item
  contact.each_value do |value|
    puts value
  end
end

1 Answer

The loop is incorrect.

contact_list.each do |item| # This is going to do a full iteration
  contact = item 
  contact.each_value do |value| # Here you are doing another within the first iteration.
    puts value # you are only printing the value and not the key
  end
end

What they are looking for is actually this:

contact_list = [
  {"name" => "Jason", "phone_number" => "123"},
  {"name" => "Nick", "phone_number" => "456"}
]

contact_list.each do |item|
  # Every iteration will take what item has and print key and value
  puts item["name"]
  puts item["phone_number"]
end

Jonathan,

Did you run my code? Even my code is giving the same output as yours.

Anil.