mapIsEqual function

bool mapIsEqual(dynamic a, dynamic b)

Compares two dynamic objects to check if they are equal.

This function supports comparison of nested Maps and Lists. It recursively checks the equality of each element in the Maps or Lists. If the objects are neither Maps nor Lists, it performs a simple equality check.

• Parameters:

  • a: The first dynamic object to compare.
  • b: The second dynamic object to compare.

• Returns: A boolean value indicating whether the two objects are equal.

Implementation

bool mapIsEqual(dynamic a, dynamic b) {
  // Layer copies share their meta maps, and the state history export compares
  // every layer of every step, so skip walking a map compared with itself.
  if (identical(a, b)) return true;
  if (a is Map && b is Map) {
    if (a.length != b.length) return false;
    for (var key in a.keys) {
      if (!b.containsKey(key) || !mapIsEqual(a[key], b[key])) {
        return false;
      }
    }
    return true;
  } else if (a is List && b is List) {
    if (a.length != b.length) return false;
    for (int i = 0; i < a.length; i++) {
      if (!mapIsEqual(a[i], b[i])) {
        return false;
      }
    }
    return true;
  } else {
    return a == b;
  }
}