function defaultCompare(a, b) {
  return a > b ? 1 : a < b ? -1 : 0;
}
Compares its two arguments for order, using the built in < and >
operators.
@param {VALUE} a The first object to be compared.
@param {VALUE} b The second object to be compared.
@return {number} A negative number, zero, or a positive number as the first
    argument is less than, equal to, or greater than the second,
    respectively.
@template VALUE