# Comparator<T> constructor

const Comparator<T>()

An abstract class that imposes a total ordering on a collection of objects of type `T`.

A `Comparator` can be used to:

- Sort lists (`List.sort(comparator)`).
- Control ordering in sorted collections (e.g., custom trees or ordered maps).
- Provide alternate sort logic for types that don’t implement `Comparable`.

This Dart class is inspired by Java's `java.util.Comparator`.

### 📌 Example Usage

    final Comparator<String> byLength = Comparator.comparing((s) => s.length);

    final names = ['Alice', 'Bob', 'Christina'];
    names.sort(byLength.compare);

    print(names); // [Bob, Alice, Christina]

You can also chain comparators:

    final byLengthThenAlphabet = Comparator.comparing((s) => s.length)
        .thenComparing(Comparator.naturalOrder());

    final list = ['Tom', 'Ann', 'Tim', 'Jim', 'Alex'];
    list.sort(byLengthThenAlphabet.compare);

    print(list); // [Ann, Jim, Tom, Tim, Alex]

## Implementation

    const Comparator();