descending function Sorting data

num descending(
  1. Object? a,
  2. Object? b
)

Returns -1 if a is greater than b, or 1 if a is less than b, or 0.

This is the comparator function for reverse natural order.

Implementation

num descending(Object? a, Object? b) {
  return a == null || b == null || a != a || b != b
      ? double.nan
      : -(a as Comparable).compareTo(b);
}