星座判斷

astro.rb

def within_date?(date, from_date, to_date)
  date = date.to_date
  (Time.parse("#{date.year}/#{from_date}").to_date..Time.parse("#{date.year}/#{to_date}").to_date).include?(date)
end

date = Time.parse("1982-3-30")
puts within_date?(date, "3/1", "3/30").inspect
puts within_date?(date, "2/1", "2/28").inspect

if within_date?(date, "3/1", "3/30")
  astro = 1
elsif within_date?(date, "3/1", "3/30")
  astro = 2
else # 跨年的摩羯座
  astro = 10
end