phase 0 unit 2 week 1boggle class challenge

0.2.1-boggle_class_from_methods.rb

class Boggle_board

	def initialize(board)
	  @board = board.clone
	end

	def create_word(*coords)
	  coords.map { |coord| @board[coord.first][coord.last]}.join("")  # returns a word built from coordinates
	end
	 
	def get_row(row)
	  @board[row]                      # returns a row from a boggle board
	end
	 
	def get_col(col)
	  @board.collect { |row| row[col]} # returns a column from a boggle board
	end

	def get_coord(y, x)
	  @board[y][x]
	end

	def valid_coord(x, y)
	  x * y >= 0 && x < @board.length && y < @board.length
	end

	def get_diag(x, y, dir = 1)
	  output = []
	  if not valid_coord(x,y)
	 	raise "Error - coordinate must be inside the board x = #{x} y = #{y}"
	  elsif y == 0 || (x == 0 && dir == 1) || (x == @board.length-1 && dir == -1)
		while valid_coord(x,y)
		  output.push get_coord(y,x)
		  x += dir
		  y += 1
		end
	  	return output
	  else
	  	get_diag(x-dir,y-1,dir)
	  end
	end
end

dice_grid = [["b", "r", "a", "e"],
			["i", "o", "d", "t"],
	        ["e", "c", "l", "r"],
	        ["t", "a", "k", "e"]]

bog_board = Boggle_board.new(dice_grid)

puts bog_board.get_row(1) == ["i", "o", "d", "t"] 
puts bog_board.get_row(2) == ["e", "c", "l", "r"] 
puts bog_board.get_row(3) == ["t", "a", "k", "e"] 
	 
puts bog_board.get_col(0) == ["b", "i", "e", "t"]
puts bog_board.get_col(1) == ["r", "o", "c", "a"]
puts bog_board.get_col(2) == ["a", "d", "l", "k"]
	 
puts bog_board.create_word([2,1], [1,1], [1,2], [0,3]) == "code"  
puts bog_board.create_word([0,1], [1,1], [2,1], [3,2] ) == "rock"
puts bog_board.create_word([1,0], [2,1], [2,0]) == "ice"  
puts bog_board.create_word([1,2], [1,1], [2,1], [3,2]) == "dock"

puts bog_board.get_coord(3,2)
puts bog_board.get_diag(1,3)
puts bog_board.get_diag(1,3,-1)