Compare two nested hashes

gistfile1.rb

def compare_hashes(hash_a, hash_b, parent_keys = [])
  keys_in_both = hash_a.keys & hash_b.keys

  parent_name = parent_keys.map{|k| "['#{k}']"}.join

  keys_in_both.each do |key|
    if hash_a[key] != hash_b[key]
      if hash_a[key].is_a?(Hash) && hash_b[key].is_a?(Hash)
        compare_hashes(hash_a[key], hash_b[key], parent_keys + [key])
      else
        puts "#{parent_name} Key differs: #{key}"
      end
    end
  end

  hash_a_keys = hash_a.keys.reject {|k| hash_a[k].blank?}
  hash_b_keys = hash_b.keys.reject {|k| hash_b[k].blank?}

  unless (hash_a_keys - hash_b_keys).empty?
    puts "#{parent_name} Keys just in A: #{hash_a_keys - hash_b_keys}"
  end

  unless (hash_b_keys - hash_a_keys).empty?
    puts "#{parent_name} Keys just in B: #{hash_b_keys - hash_a_keys}"
  end
end