gistfile1.rb

# each
def self.lookup_primary_email(person_id)
  emails_for_person = emails[person_id] || {}
  emails_for_person.values.flatten.each do |email|
    return email if email["primary"] == "1"
  end
  nil
end


# find
def self.lookup_primary_email(person_id)
  emails_for_person = emails[person_id] || {}
  emails_for_person.values.flatten.find { |email| email["primary"] == "1" }
end