function basePullAll(array, values, iteratee, comparator) {
  var indexOf = comparator ? baseIndexOfWith : baseIndexOf,
      index = -1,
      length = values.length,
      seen = array;

  if (array === values) {
    values = copyArray(values);
  }

  if (iteratee) {
    seen = arrayMap(array, baseUnary(iteratee));
  }

  while (++index < length) {
    var fromIndex = 0,
        value = values[index],
        computed = iteratee ? iteratee(value) : value;

    while ((fromIndex = indexOf(seen, computed, fromIndex, comparator)) > -1) {
      if (seen !== array) {
        splice.call(seen, fromIndex, 1);
      }

      splice.call(array, fromIndex, 1);
    }
  }

  return array;
}
The base implementation of `_.pullAllBy` without support for iteratee
shorthands.

@private
@param {Array} array The array to modify.
@param {Array} values The values to remove.
@param {Function} [iteratee] The iteratee invoked per element.
@param {Function} [comparator] The comparator invoked per element.
@returns {Array} Returns `array`.