thenComparingComparable<U extends Comparable<U>> method

Comparator<T> thenComparingComparable<U extends Comparable<U>>(
  1. U keyExtractor(
    1. T
    )
)

Chains a comparator by extracting a Comparable key from each element.

If this comparator returns 0, the key extractor will be used with natural ordering.

Example

final byNameLength = Comparator.comparing((s) => s.length);
final thenByAlpha = byNameLength.thenComparingComparable((s) => s);

final list = ['Ann', 'Tom', 'Bob'];
list.sort(thenByAlpha.compare);
print(list); // [Ann, Bob, Tom]

Implementation

Comparator<T> thenComparingComparable<U extends Comparable<U>>(U Function(T) keyExtractor) {
  return thenComparing(Comparator.comparing(keyExtractor));
}