valid Soduku

gistfile1.js

function getBox(board, x, y) {
  var from = x * 3;
  var to = from + 3;
  var target = y * 3;

  return board[0+target].slice(from, to)
       .concat(board[1+target].slice(from, to))
       .concat(board[2+target].slice(from, to))
}

function getCol (board, x) {
  var tmp = []
  for (var i = 0; i < 9; i++) {
    tmp.push(board[i][x])
  }
  return tmp
}

function getRow (board, y) {
  return board[y].slice(0)
}

function isValid (subset) {
  return subset.sort().join('') == '123456789' 
}

function validSolution(board) {
  for (var i = 0; i < 9; i++) 
    if(!isValid(getRow(board, i) || !isValid(getCol(board, i))))
      return false;

  for (var x = 0; x < 3; x++) 
    for (var y = 0; y < 3; y++) 
      if(!isValid(getBox(board, x, y))) 
        return false;

  return true;
}