code: function lastIndexOf(array, value, fromIndex) {
          var length = array ? array.length : 0;
          if (!length) {
            return -1;
          }
          var index = length;
          if (fromIndex !== undefined) {
            index = toInteger(fromIndex);
            index = (index < 0 ? nativeMax(length + index, 0) : nativeMin(index, length - 1)) + 1;
          }
          if (value !== value) {
            return indexOfNaN(array, index, true);
          }
          while (index--) {
            if (array[index] === value) {
              return index;
            }
          }
          return -1;
        }
docs: This method is like `_.indexOf` except that it iterates over elements of
  `array` from right to left.
  
  @static
  @memberOf _
  @category Array
  @param {Array} array The array to search.
  @param {*} value The value to search for.
  @param {number} [fromIndex=array.length-1] The index to search from.
  @returns {number} Returns the index of the matched value, else `-1`.
  @example
  
  _.lastIndexOf([1, 2, 1, 2], 2);
  // => 3
  
  // Search from the `fromIndex`.
  _.lastIndexOf([1, 2, 1, 2], 2, 2);
  // => 1