sudoku

sudoku_validator.rb

def valid?(pattern)
  pattern.map(&:uniq!).map(&:nil?).include?(false) ? false : true
end

def validSolution(board)
  rows, columns, grids = board, [], []
  
  9.times do |i|
    column, grid = [], []
    board.map { |row| column << row[i] }
    columns << column
    board.drop(i*3).take(3).map{|row| grid << row.drop(i*3).take(3)}
    grids << grid.flatten.drop(i*9).take(9)
  end
  
  valid?(rows) && valid?(columns) && valid?(grids)
end