1  /**
 2   * The base implementation of `_.reduce` and `_.reduceRight`, without support
 3   * for iteratee shorthands, which iterates over `collection` using `eachFunc`.
 4   *
 5   * @private
 6   * @param {Array|Object} collection The collection 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 or last element of
10   *  `collection` as the initial value.
11   * @param {Function} eachFunc The function to iterate over `collection`.
12   * @returns {*} Returns the accumulated value.
13   */
14  function baseReduce(collection, iteratee, accumulator, initAccum, eachFunc) {
15    eachFunc(collection, function(value, index, collection) {
16      accumulator = initAccum
17        ? (initAccum = false, value)
18        : iteratee(accumulator, value, index, collection);
19    });
20    return accumulator;
21  }
22  
23  module.exports = baseReduce;