pigeon-data-refactor.rb

pigeon_data = {
  :color => {
    :purple => ["Theo", "Peter Jr.", "Lucky"],
    :grey => ["Theo", "Peter Jr.", "Ms .K"],
    :white => ["Queenie", "Andrew", "Ms .K", "Alex"],
    :brown => ["Queenie", "Alex"]
  },
  :gender => {
    :male => ["Alex", "Theo", "Peter Jr.", "Andrew", "Lucky"],
    :female => ["Queenie", "Ms .K"]
  },
  :lives => {
    "Subway" => ["Theo", "Queenie"],
    "Central Park" => ["Alex", "Ms .K", "Lucky"],
    "Library" => ["Peter Jr."],
    "City Hall" => ["Andrew"]
  }
}

pigeon_list = {}
pigeon_data.each do |property, value_hash|
  value_hash.each do |value, bird_names|
    bird_names.each do |name|
      pigeon_list[name] ||= {}
      pigeon_list[name][property] ||= []
      pigeon_list[name][property] << value.to_s
    end
  end
end


# pigeon_list = {
#   "Theo" => {
#     :color => ["purple", "grey"],
#     :gender => "male",
#     :lives => "Subway"
#   },
#   "Peter Jr." => {
#     :color => ["purple", "grey"],
#     :gender => "male",
#     :lives => "Library"
#   },
#   "Lucky" => {
#     :color => ["purple"],
#     :gender => "male",
#     :lives => "City Hall"
#   },
#   "Ms .K" => {
#     :color => ["grey", "white"],
#     :gender => "female",
#     :lives => "Central Park"
#   },
#   "Queenie" => {
#     :color => ["white", "brown"],
#     :gender => "female",
#     :lives => "Subway"
#   },
#   "Andrew" => {
#     :color => ["white"],
#     :gender => "male",
#     :lives => "Central Park"
#   },
#   "Alex" => {
#     :color => ["white", "brown"],
#     :gender => "male",
#     :lives => "Central Park"
#   }
# }