Chinese Zodiac Animals

chinese_zodiac_animal.rb

ZodiacAnimal = Data.define(:icon, :name, :chinese_name, :earthly_branch, :element, :trine, :yin) do
  def self.all
    [
      new( icon: "🐭", name: "Rat",     chinese_name: "鼠", earthly_branch: "子", element: "Water", trine: 1, yin: false ),
      new( icon: "🐂", name: "Ox",      chinese_name: "牛", earthly_branch: "丑", element: "Earth", trine: 2, yin: true ),
      new( icon: "🐅", name: "Tiger",   chinese_name: "虎", earthly_branch: "寅", element: "Wood" , trine: 3, yin: false ),      
      new( icon: "🐇", name: "Rabbit",  chinese_name: "兔", earthly_branch: "卯", element: "Wood" , trine: 4, yin: true ),
      new( icon: "🐉", name: "Dragon",  chinese_name: "龙", earthly_branch: "辰", element: "Earth", trine: 1, yin: false),
      new( icon: "🐍", name: "Snake",   chinese_name: "蛇", earthly_branch: "巳", element: "Fire" , trine: 2, yin: true ),
      new( icon: "🐎", name: "Horse",   chinese_name: "马", earthly_branch: "午", element: "Fire" , trine: 3, yin: false),
      new( icon: "🐐", name: "Goat",    chinese_name: "羊", earthly_branch: "未", element: "Earth", trine: 4, yin: true ),
      new( icon: "🐒", name: "Monkey",  chinese_name: "猴", earthly_branch: "申", element: "Metal", trine: 1, yin: false),
      new( icon: "🐓", name: "Rooster", chinese_name: "鸡", earthly_branch: "酉", element: "Metal", trine: 2, yin: true ),
      new( icon: "🐕", name: "Dog",     chinese_name: "狗", earthly_branch: "戌", element: "Earth", trine: 3, yin: false),
      new( icon: "🐖", name: "Pig",     chinese_name: "猪", earthly_branch: "亥", element: "Water", trine: 4, yin: true ),
    ]
  end
  
  def self.for_year(year)
    all[(year - 4) % 12] # 4 is the base year (Rat starts in 4 AD)
  end
  
  def yin?  =  yin
  def yang? = !yin
end