A calculator for holes in memory

rachels_poem.rb

class RachelsPoem
  attr_accessor :holes_per_year, :years, :split_after_years
  attr_reader :total_holes

  def initialize(holes_per_day:3, years:23, days_per_year:365.25, split_after_years:7)
    @total_holes = 0
    self.holes_per_year = holes_per_day * days_per_year
    self.years = years
    self.split_after_years = split_after_years
  end

  def calculate!
    while years > split_after_years
      self.years -= split_after_years

      # Add `split_after_years` number of holes
      @total_holes += (split_after_years * holes_per_year)

      # split holes
      @total_holes *= 2
    end

    # Add remaining years' holes
    @total_holes += (years * holes_per_year)
  end
end