Days Remaining In Year

days_remaining.rb

# Description : Script to Return Remaining Days in the Year
# User puts in a date and gets the number of the day (e.g. day 1) and the number of days left in the year 

class DayOfYear
	def initialize
		@days_in_months = [31,28,31,30,31,30,31,31,30,31,30,31]
	end

	def date_info(date)
		return "days number : #{days_elapsed(date.month,date.day,date.year)}, days remaining in year : #{days_remaining(date.month,date.day,date.year)}"
	end

	def days_elapsed(month, day, year, elapsed = 0)
		month != 1 ? ((month - 1).downto(1) {|mon| elapsed += @days_in_months[mon]}) : elapsed
		elapsed += 1 if is_leap?(year) && month > 2
		return elapsed += day
	end

	def days_remaining(month,day,year)
		is_leap?(year) ? (return 366 - days_elapsed(month,day,year)) : (return 365 - days_elapsed(month,day,year))
	end

	def is_leap?(year)
		return true if (year % 400 == 0 || year % 100 == 0 || year % 4 == 0) 
	end	
end

get_day = DayOfYear.new
puts get_day.date_info(Time.new(2011,03,01))
puts get_day.date_info(Time.new(2012,03,01))
puts get_day.date_info(Time.new(2011,02,28))
puts get_day.date_info(Time.new(2012,02,28))
puts get_day.date_info(Time.new(2012,01,01))
puts get_day.date_info(Time.new(2011,01,01))