readable_time.rb

  def readable secs
    return "0 minute" if secs < 60
    secs /= 60
    [[60, :minute], [24, :hour], [Float::INFINITY, :day]].map{ |count, name|
      if secs > 0
        secs, n = secs.divmod(count)
        pluralize(n.to_i, name.to_s) if n > 0
      end
    }.compact.reverse.join(' ')
  end