Class: EquityCalculator

Inherits:
Object
  • Object
show all
Defined in:
lib/rora/utils/equity_calculator.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ EquityCalculator

Returns a new instance of EquityCalculator.



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# File 'lib/rora/utils/equity_calculator.rb', line 5

def initialize
  @hand_repository = HandRepository.instance
  @best_scores = Hash.new
end

Instance Method Details

#calculate_equity(starting_hands, board = Board.new) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/rora/utils/equity_calculator.rb', line 10

def calculate_equity(starting_hands, board = Board.new)
  raise ArgumentError, "Must have at least two starting hands for equity comparison" if (starting_hands.nil? || starting_hands.size < 2)
  raise ArgumentError, "There are duplicate cards" if duplicates?(starting_hands, board)

  equity_map = Hash[starting_hands.map{|starting_hand| [starting_hand, 0]}]
  game = Deck.new.remove(merge(starting_hands, board)).combination(5 - board.cards.size)
    
  game.each do |cards| 
    showdown(equity_map, starting_hands, board.cards + cards) 
  end

  total_winning_hands = equity_map.inject(0) {|total, result| total += result[1]}
  equity_map.inject(Hash.new) { |hash, result| hash[result[0]] = Equity.new(game.size, total_winning_hands, result); hash}
end