compareTo method

@override int compareTo(IndividualElement 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.

Implementation

@override
int compareTo(IndividualElement other) {
  if (birthDate == null) {
    return -1;
  }
  if (other.birthDate == null) {
    return 1;
  }

  final value = birthDate!.compareTo(other.birthDate!);
  if (value == 0) {
    return other.name.compareTo(other.name);
  }
  return value;
}