table td to array

function td2array(table) {
  var rows = $('tr', table);
  var tbody = rows.parent();
  var ret = [];
  for (var i = 0; i < rows.length; i++) {
    var row = rows[i];
    var cols = $('td', row);
    for (var j = 0; j < cols.length; j++) {
      var col = cols[j];
      var text = col.innerText;
      if (text === '') {
        text = '0';
      }
      ret.push(text);
    }
  }
  return ret;
}