efficient_cross.rb

# 1. Create a Hash with keys of directions that have been checked for a match
class Piece
  @checked_directions = {:horizontal => false, :vertical => false, :left_diag => false, :right_diag => false}
end
# 2. Iterate through each element (as was previously implemented)

# DUP All the pieces for this next step O(n^2) where n is the width of the grid.
dup_pieces = pieces.map {|el| el.dup}

pieces.any? { |piece| piece.winning? }


# 3. Winning will now only iterate through directions that have not been checked yet,
#     it will need to extend in both directions. If it finds it not to be winning, return false.

def winning?
  @checked_directions.each do |dir, checked_yet|
    when dir
    case :horizontal
      if !checked_yet  # will only run if the row has not already been checked
        
        # left_sum = iterate through all contiguous Peices to the left until end case
        # right_sum = iterate through all contiguous Peices to the right until end case
        ### at each piece you check, mark  as checked ###
      else
        # DONT CHECK ANYTHING IN THIS ROW ANYMORE
      end
    case :
      ...
    end
  end
  
  
end