Sort 2d Array by Column

/*
Sort 2D array by column
PASS: theArray (a 2D array), sortColumn(the column to sort by), sortAsString (if true, converts the value to a string before comparing)
RETURNS: theArray, sorted by the column specified
*/
function sort2DArray (theArray, sortColumn, sortAsString = false) {
  theArray = theArray.sort(function(x,y){
    if (sortAsString) {
      var xp = x[sortColumn].toString();
      var yp = y[sortColumn].toString();
    } else {
      var xp = x[sortColumn];
      var yp = y[sortColumn];
    }
      return xp == yp ? 0 : xp < yp ? -1 : 1;
    });
  return theArray;
}