connerpeirce.rb

# @author = Conner Peirce

require 'Time'
# assumes that times are within 13 hours of each other
# uses naive compare between current time and last time
def average_time_of_day( times, hourDiff = 13 )
  day = 60*60*24 # in seconds
  sum = 0
  prevt= Time.parse(times[0]).to_f
  for t in times do
    parsedt = Time.parse(t).to_f
    # if the new time is more than hourDiff from the last time
    # then we assume that the day is off and add or subtract a day
    if (parsedt-prevt).abs > (60*60*hourDiff)
      if parsedt > prevt then nt = parsedt - day
      else nt = parsedt + day
      end
    else nt = parsedt
    end
    sum+= nt
    prevt = parsedt
  end
  Time.at(sum/times.length).strftime("%I:%M%p").downcase
end

p 'average_time_of_day(["11:51pm", "11:56pm", "12:01am", "12:06am", "12:11am"])'
average_time_of_day(["11:51pm", "11:56pm", "12:01am", "12:06am", "12:11am"])
p 'average_time_of_day(["6:41am", "6:51am", "7:01am"])'
average_time_of_day(["6:41am", "6:51am", "7:01am"])