ConvertingComparator<S, T>.converter constructor

A comparator that compares source values of type S by first converting them to another type T using a Converter, then applying a Comparator on T.

This is useful when you want to sort values based on a derived property or a type transformation.

🔧 Example: Compare strings by their lengths

final comparator = ConvertingComparator<String, int>(
  Comparator.naturalOrder(),
  Converter<String, int>((s) => s.length),
);

final list = ['pear', 'banana', 'kiwi'];
list.sort(comparator); // ['kiwi', 'pear', 'banana']

You can also use the factory constructors:

🔧 Using withConverter and a ConversionService:

final service = DefaultConversionService();
final comparator = ConvertingComparator.withConverter<String, int>(
  Comparator.naturalOrder(),
  service,
  Class<int>(),
);

Uses Comparator.naturalOrder as the default comparator for T.