Measure difference between 2 times

time_span.rb

class TimeSpan

  def initialize(seconds)
    @seconds = (seconds || 0).abs
  end

  def in_seconds
    @seconds
  end

  def in_full_seconds
    in_seconds.floor
  end

  def in_minutes
    @seconds.to_f / 60
  end

  def in_full_minutes
    in_minutes.floor
  end

  def in_hours
    @seconds.to_f / (60 * 60)
  end

  def in_full_hours
    in_hours.floor
  end

  def in_days
    @seconds.to_f / (24 * 60 * 60)
  end

  def in_full_days
    in_days.floor
  end

  def in_weeks
    @seconds.to_f / (7 * 24 * 60 * 60)
  end

  def in_full_weeks
    in_weeks.floor
  end

  def in_months
    @seconds.to_f / (30.4375 * 24 * 60 * 60)
  end

  def in_full_months
    in_months.floor
  end

  def in_years
    @seconds.to_f / (365.25 * 24 * 60 * 60)
  end

  def in_full_years
    in_years.floor
  end

end