code: function size(obj, ownPropsOnly) {
    var size = 0, key;
  
    if (isArray(obj) || isString(obj)) {
      return obj.length;
    } else if (isObject(obj)){
      for (key in obj)
        if (!ownPropsOnly || obj.hasOwnProperty(key))
          size++;
    }
  
    return size;
  }
docs: @description
  Determines the number of elements in an array, the number of properties an object has, or
  the length of a string.
  
  Note: This function is used to augment the Object type in Angular expressions. See
  {@link angular.Object} for more information about Angular arrays.
  
  @param {Object|Array|string} obj Object, array, or string to inspect.
  @param {boolean} [ownPropsOnly=false] Count only "own" properties in an object
  @returns {number} The size of `obj` or `0` if `obj` is neither an object nor an array.