benmiller.rb

#! /usr/bin/env ruby -w
require 'time'

HALF_A_DAY = 12 * 60
A_WHOLE_DAY = 24 * 60

def average_time_of_day the_times

  raise "You must pass me some values!" unless the_times && the_times.length > 0

  the_times.collect! { |s| t = Time.parse(s); t.hour*60 + t.min }

  min_time = the_times.min
  the_times.collect! { |t| (t - min_time) > HALF_A_DAY ? t : t + A_WHOLE_DAY } unless the_times.max - the_times.min <= HALF_A_DAY

  total = the_times.inject { |total,t| total + t }
  avg = total / the_times.length
 
  Time.at( avg * 60 ).gmtime.strftime('%I:%M%p').downcase

end