davidjenkins.rb

=begin
Purpose:write method average_time_of_day that takes an array of times in format "hh:mm(am|pm)"
	and returns the average time of those times in the same format
      e.g., 
	>> average_time_of_day(["11:51pm", "11:56pm", "12:01am", "12:06am", "12:11am"])
	=> "12:01am"
Notes : program assumes that the first time in the array is the earliest actual time in the array
Author: David Jenkins
=end

require 'time'

ONE_DAY_IN_SECONDS = (60 * 60 * 24)

def average_time_of_day times
        first_time = nil
	time_sum = 0
	times.each do |t|
		mil_time = Time.parse(t)
		first_time ||= mil_time
		if mil_time < first_time 
			mil_time+= ONE_DAY_IN_SECONDS 
		end
		time_sum += mil_time.to_i
	end
	Time.at(time_sum / times.size).strftime("%I:%M%p").downcase
end