objTo1d function

Map<String, dynamic> objTo1d(Map<String, dynamic> obj, { String? separator = '.', })

Merges objects from the given object to the top level of the child items and displays the key names in steps, using a delimiter (. by default) instead of the existing keys. For example, if an object a has keys b, c, and d, the a key is not displayed, and the keys and values a.b, a.c, and a.d are displayed in the parent step.

Implementation

Map<String, dynamic> objTo1d(Map<String, dynamic> obj,
    {String? separator = '.'}) {
  if (separator != null && separator.isEmpty) {
    throw ArgumentError('`separator` must have value at least 1 character.');
  }

  Map<String, dynamic> convertObjectTo1d(Map<String, dynamic> o,
      [String objPath = '']) {
    Map<String, dynamic> result = {};
    bool isFirstDepth = objPath.isEmpty;

    o.forEach((key, value) {
      String newObjPath = isFirstDepth ? key : '$objPath$separator$key';

      if (value is Map<String, dynamic>) {
        result.addAll(convertObjectTo1d(value, newObjPath));
      } else {
        result[newObjPath] = value;
      }
    });

    return result;
  }

  return convertObjectTo1d(obj);
}