FAQ: Data Structures - Iterating Over a Hash

This community-built FAQ covers the “Iterating Over a Hash” exercise from the lesson “Data Structures”.

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FAQs on the exercise Iterating Over a Hash

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Hello, I tried this not very smart solution to iterate over the hash. though I thought the syntax was ok, actually nothing is written on the console. Could you explain me why?

lunch_order.each { |element| element.each { |x, y| puts y }}


You’ve just gone a step too far. There is no value assigned to y. Here is the code provided in the lesson:

lunch_order = {
  "Ryan" => "wonton soup",
  "Eric" => "hamburger",
  "Jimmy" => "sandwich",
  "Sasha" => "salad",
  "Cole" => "taco"

Your code:

|element| is assigned each element of the lunch_order hash in turn, so the first value assigned is ["Ryan", "wonton soup"]. Then when you use element.each, you take these values: ["Ryan", "wonton soup"] one at a time in turn, so x gets assigned "Ryan" and y gets nothing. Then in the next iteration of this nested .each, x gets assigned "wonton soup" and y again gets nothing. Then control passes back to the first .each, and the whole process repeats with ["Eric", "hamburger"], etc.


oh ok I see… Thanks for your answer!

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Hello I tried these lines and it got stuck on “working”

  1. lunch_order.each {|x, y| puts y}
  2. lunch_order do |x, y|
    puts y

I do have the wanted results but nothing happens… I can’t continue


I stuck in same step. After some unsuccessful trials, below is worked:

lunch_order.each {|key, value| puts value }

Mine worked, but it won’t finish out the lesson. It also didn’t show the solution in there when I checked that. This works though.

#Supposedly not right in Code Academy, but it worked to make sentences. Each prints on own line.

lunch_order = {
“Ryan” => “wonton soup”,
“Eric” => “hamburger”,
“Jimmy” => “sandwich”,
“Sasha” => “salad”,
“Cole” => “taco”
lunch_order.each do |person, sides|
puts “\n#{person} wants: #{sides} sides.”

The instructions specify: Please puts out the value of each pair (just the value, not the key)

So, don’t output sentences or newline characters or keys. Simply puts sides

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