compareTo method Null safety

  1. @override
int compareTo(
  1. dynamic other

Compares this object to another object.

Returns a value like a Comparator when comparing this to other. That is, it returns a negative integer if this is ordered before other, a positive integer if this is ordered after other, and zero if this and other are ordered together.

The other argument must be a value that is comparable to this object.


int compareTo(other) {
  int result;
  if (this == other) {
    result = 0;
  } else if (this.comes_before(other)) {
    result = -1;
  } else {
    result = 1;
  return result;