2 * The base implementation of `_.reduce` and `_.reduceRight` without support
3 * for callback shorthands and `this` binding, which iterates over `collection`
4 * using the provided `eachFunc`.
7 * @param {Array|Object|string} collection The collection to iterate over.
8 * @param {Function} iteratee The function invoked per iteration.
9 * @param {*} accumulator The initial value.
10 * @param {boolean} initFromCollection Specify using the first or last element
11 * of `collection` as the initial value.
12 * @param {Function} eachFunc The function to iterate over `collection`.
13 * @returns {*} Returns the accumulated value.
15 function baseReduce(collection, iteratee, accumulator, initFromCollection, eachFunc) {
16 eachFunc(collection, function(value, index, collection) {
17 accumulator = initFromCollection
18 ? (initFromCollection = false, value)
19 : iteratee(accumulator, value, index, collection);
24 module.exports = baseReduce;