1  /**
 2   * A specialized version of `baseAggregator` for arrays.
 3   *
 4   * @private
 5   * @param {Array} [array] The array to iterate over.
 6   * @param {Function} setter The function to set `accumulator` values.
 7   * @param {Function} iteratee The iteratee to transform keys.
 8   * @param {Object} accumulator The initial aggregated object.
 9   * @returns {Function} Returns `accumulator`.
10   */
11  function arrayAggregator(array, setter, iteratee, accumulator) {
12    var index = -1,
13        length = array == null ? 0 : array.length;
14  
15    while (++index < length) {
16      var value = array[index];
17      setter(accumulator, value, iteratee(value), array);
18    }
19    return accumulator;
20  }
21  
22  module.exports = arrayAggregator;