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/** * A specialized version of `baseAggregator` for arrays. * * @private * @param {Array} [array] The array to iterate over. * @param {Function} setter The function to set `accumulator` values. * @param {Function} iteratee The iteratee to transform keys. * @param {Object} accumulator The initial aggregated object. * @returns {Function} Returns `accumulator`. */function arrayAggregator(array, setter, iteratee, accumulator) {  var index = -1,      length = array == null ? 0 : array.length;
  while (++index < length) {    var value = array[index];    setter(accumulator, value, iteratee(value), array);  }  return accumulator;}
module.exports = arrayAggregator;