mapEquality function

bool mapEquality(Map<String, dynamic>? map1, Map<String, dynamic>? map2)

Checks equality between two maps map1 and map2.

Returns true if both maps are structurally equal, meaning they have the same keys and corresponding values. Returns false otherwise.

If either map1 or map2 is null, the function returns false.

Equality is determined recursively for nested maps and directly for non-map values.

Example usage:

Map<String, dynamic> map1 = {
  'name': 'John',
  'age': 30,
  'address': {
    'city': 'New York',
    'zip': 10001,
  },
};

Map<String, dynamic> map2 = {
  'name': 'John',
  'age': 30,
  'address': {
    'city': 'New York',
    'zip': 10001,
  },
};

bool result = mapEquality(map1, map2); // true

Implementation

bool mapEquality(Map<String, dynamic>? map1, Map<String, dynamic>? map2) {
  if (map1 == null || map2 == null) return false;

  // Check if both maps have the same keys
  if (map1.keys.toSet().difference(map2.keys.toSet()).isNotEmpty ||
      map2.keys.toSet().difference(map1.keys.toSet()).isNotEmpty) {
    return false;
  }

  // Check if all key-value pairs are equal
  for (var key in map1.keys) {
    var value1 = map1[key];
    var value2 = map2[key];

    if (value1 is Map<String, dynamic> && value2 is Map<String, dynamic>) {
      // Recursively check nested maps
      if (!mapEquality(value1, value2)) {
        return false;
      }
    } else if (value1 != value2) {
      // Compare values directly
      return false;
    }
  }

  return true;
}