dot static method

Map<String, dynamic> dot(
  1. Map map, [
  2. String prefix = ''
])

Flattens a nested map into a single-level map keyed by dot-paths.

Source keys that already contain dots are kept verbatim, which means a dot → undot round-trip is lossy when input keys contain ..

Obj.dot({'a': {'b': 1, 'c': 2}}); // {'a.b': 1, 'a.c': 2}

Implementation

static Map<String, dynamic> dot(Map map, [String prefix = '']) {
  final result = <String, dynamic>{};
  map.forEach((k, v) {
    final key = prefix.isEmpty ? k.toString() : '$prefix.$k';
    if (v is Map && v.isNotEmpty) {
      result.addAll(dot(v, key));
    } else {
      result[key] = v;
    }
  });
  return result;
}