sortBy method

List<Map<T, T>> sortBy(
  1. String key, {
  2. bool isDesc = false,
})

Sorts a list of maps by the given key.

key is the key to sort by. If isDesc is true, the list will be sorted in descending order.

Example:

final sortedMaps = list.sortBy("price");

Implementation

List<Map<T, T>> sortBy(String key, {bool isDesc = false}) {
  final List<Map<T, T>> maps = whereType<Map<T, T>>()
      .where((Map<T, T> element) => element.containsKey(key))
      .toList();
  try {
    maps.sort((Map<T, T> a, Map<T, T> b) {
      final T? aValue = a[key];
      final T? bValue = b[key];
      if (aValue is Comparable && bValue is Comparable) {
        return aValue.compareTo(bValue);
      }
      throw ArgumentError('Values for key "$key" must be comparable');
    });
  } on ArgumentError {
    return <Map<T, T>>[];
  }
  return isDesc ? maps.reversed.toList() : maps;
}