Method dropUndefinedProperties

packages/core/src/utils/Utils.ts:204–227

* Removes `undefined` properties (recursively) so they are not saved as nulls

(o: any, value?: null, visited: Set<unknown> = new Set())

   * Removes `undefined` properties (recursively) so they are not saved as nulls
   */
  static dropUndefinedProperties(o: any, value?: null, visited: Set<unknown> = new Set()): void {
    if (Array.isArray(o)) {
      for (const item of o) {
        Utils.dropUndefinedProperties(item, value, visited);
      }

      return;
    }

    if (!Utils.isPlainObject(o) || visited.has(o)) {
      return;
    }

    visited.add(o);

    for (const key of Object.keys(o)) {
      if (o[key] === value) {
        delete o[key];
        continue;
      }

      Utils.dropUndefinedProperties(o[key], value, visited);
    }
  }

  /**
   * Returns the number of properties on `obj`. This is 20x faster than Object.keys(obj).length.