Function shimIsPlainObject

lib/web/jshint.js:5888–5909

* A fallback implementation of `_.isPlainObject` which checks if `value` * is an object created by the `Object` constructor or has a `[[Prototype]]` * of `null`. * * @private * @param {*} value The value to check. * @returns {boolean} Returns `true` if `value` is a plai

(value)

     * @returns {boolean} Returns `true` if `value` is a plain object, else `false`.
     */
    function shimIsPlainObject(value) {
      var Ctor,
          support = lodash.support;

      // Exit early for non `Object` objects.
      if (!(isObjectLike(value) && objToString.call(value) == objectTag) ||
          (!hasOwnProperty.call(value, 'constructor') &&
            (Ctor = value.constructor, typeof Ctor == 'function' && !(Ctor instanceof Ctor)))) {
        return false;
      }
      // IE < 9 iterates inherited properties before own properties. If the first
      // iterated property is an object's own property then there are no inherited
      // enumerable properties.
      var result;
      // In most environments an object's own properties are iterated before
      // its inherited properties. If the last iterated property is an object's
      // own property then there are no inherited enumerable properties.
      baseForIn(value, function(subValue, key) {
        result = key;
      });
      return result === undefined || hasOwnProperty.call(value, result);
    }

    /**
     * A fallback implementation of `Object.keys` which creates an array of the