f_dur.rb

def format_duration(n)
  return "now" if n == 0

  minutes, seconds = n.divmod(60)
  hours, minutes = minutes.divmod(60)
  days, hours = hours.divmod(24)
  years, days = days.divmod (365)

  years == 0 ? tri_years = 0 : years == 1 ? tri_years = 1 : tri_years = 2
  days == 0 ? tri_days = 0 : days == 1 ? tri_days = 1 : tri_days = 2
  hours == 0 ? tri_hours = 0 : hours == 1 ? tri_hours = 1 : tri_hours = 2
  minutes == 0 ? tri_minutes = 0 : minutes == 1 ? tri_minutes = 1 : tri_minutes = 2
  seconds == 0 ? tri_seconds = 0 : seconds == 1 ? tri_seconds = 1 : tri_seconds = 2

  plural_singular_arr = []
  plural_singular_arr << "years" if tri_years == 2
  plural_singular_arr << "year" if tri_years == 1
  plural_singular_arr << "days" if tri_days == 2
  plural_singular_arr << "day" if tri_days == 1
  plural_singular_arr << "hours" if tri_hours == 2
  plural_singular_arr << "hour" if tri_hours == 1
  plural_singular_arr << "minutes" if tri_minutes == 2
  plural_singular_arr << "minute" if tri_minutes == 1
  plural_singular_arr << "seconds" if tri_seconds == 2
  plural_singular_arr << "second" if tri_seconds == 1

  units_arr = []
  units_arr << "years" if tri_years != 0
  units_arr << "days" if tri_days != 0
  units_arr << "hours" if tri_hours != 0
  units_arr << "minutes" if tri_minutes != 0
  units_arr << "seconds" if tri_seconds != 0

  temp_arr = units_arr.map {|unit| binding.local_variable_get unit}
  temp_str = ""
  units_arr.each_index {|index|
    temp_str += "#{temp_arr[index]} #{plural_singular_arr[index]}, " if index < units_arr.length - 2
    temp_str += "#{temp_arr[index]} #{plural_singular_arr[index]} and " if index == units_arr.length - 2
    temp_str += "#{temp_arr[index]} #{plural_singular_arr[index]}" if index == units_arr.length - 1
  }

  temp_str
end

puts format_duration(63252122)