function baseReduce(collection, iteratee, accumulator, initFromCollection, eachFunc) {
	      eachFunc(collection, function(value, index, collection) {
	        accumulator = initFromCollection
	          ? (initFromCollection = false, value)
	          : iteratee(accumulator, value, index, collection);
	      });
	      return accumulator;
	    }
The base implementation of `_.reduce` and `_.reduceRight` without support
for callback shorthands and `this` binding, which iterates over `collection`
using the provided `eachFunc`.

@private
@param {Array|Object|string} collection The collection to iterate over.
@param {Function} iteratee The function invoked per iteration.
@param {*} accumulator The initial value.
@param {boolean} initFromCollection Specify using the first or last element
 of `collection` as the initial value.
@param {Function} eachFunc The function to iterate over `collection`.
@returns {*} Returns the accumulated value.