sort.js

function sort(rows, key, dir) {
  if (!key || !rows || typeof rows.sort !== "function" || !rows.length) {
    return rows;
  }
  var dir = dir ? String(dir).toLowerCase() : "up";
  if (typeof key === "function") {
    return rows.sort(key);
  } else {
    return rows.sort(function(rowA, rowB) {
      if (dir === "u" || dir === "up" || dir === "asc") {
        return rowA[key] > rowB[key];
      } else {
        return rowA[key] < rowB[key];
      }
    });
  }
}