code: function getPathArray(path) {
      var pathArray = [];
      path.replace(rePropName, function(match, number, quote, string) {
          pathArray.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
      });
      return pathArray;
  }
docs: refer to node_modules/lodash/internal/toPath.js
  
  @private