Dart Flutter Tips

Sorting collections

Instead of using the 'compare' in 'sort' every time, you can override a method 'compareTo' in your object.

Plague Fox Jun 9, 2022

Sorting collections — Photo by Jan Antonin Kolar / Unsplash

Instead of using the compare in sort every time, you can override a method compareTo in your object.

void main() {
  final sortedArray = <A>[A(3), A(1), A(2)]..sort();
  print(sortedArray); // <A>[A(1), A(2), A(3)]
}

class A with Comparabte<A> {
  const A(this.id);

  final int id;

  @override
  int compareTo(A other) => id.compareTo(other.id);
  
  @override
  String toString() => 'A($id)';
}