1/**
2 * A specialized version of `_.reduce` for arrays without support for
3 * iteratee shorthands.
4 *
5 * @private
6 * @param {Array} [array] The array to iterate over.
7 * @param {Function} iteratee The function invoked per iteration.
8 * @param {*} [accumulator] The initial value.
9 * @param {boolean} [initAccum] Specify using the first element of `array` as
10 *  the initial value.
11 * @returns {*} Returns the accumulated value.
12 */
13function arrayReduce(array, iteratee, accumulator, initAccum) {
14  var index = -1,
15      length = array == null ? 0 : array.length;
16
17  if (initAccum && length) {
18    accumulator = array[++index];
19  }
20  while (++index < length) {
21    accumulator = iteratee(accumulator, array[index], index, array);
22  }
23  return accumulator;
24}
25
26module.exports = arrayReduce;
27