Multiple constructors

minefield.rb

class Minefield
  def initialize(map)
    @map = map
  end
  
  def self.initialize_with_random_mines(size: , mine_count:)
    map = Array.new(size) { Array.new(size) { Cell.new } }
    
    mine_count.times do |_|
      row = rand(size)
      col = rand(size)
      unless map[row][col].has_mine?
        map[row][col].place_mine
      end
    end
    
    self.new(map)
  end
  
  private
  
  attr_reader :map
end