thenComparingWith<U> method

Comparator<T> thenComparingWith<U>(
  1. U keyExtractor(
    1. T
    ),
  2. Comparator<U> keyComparator
)

Chains a comparator by extracting a key with keyExtractor and comparing it using the given keyComparator.

Example

final byNameLength = Comparator.comparing((s) => s.length);
final thenByLastChar = byNameLength.thenComparingWith(
  (s) => s[s.length - 1],
  Comparator.naturalOrder(),
);

final names = ['Joe', 'Jim', 'Jon'];
names.sort(thenByLastChar.compare);
print(names); // [Jim, Jon, Joe]

Implementation

Comparator<T> thenComparingWith<U>(U Function(T) keyExtractor, Comparator<U> keyComparator) {
  return thenComparing(_ComparingComparator(keyExtractor, keyComparator));
}