1var arrayAggregator = require('./_arrayAggregator'),
2    baseAggregator = require('./_baseAggregator'),
3    baseIteratee = require('./_baseIteratee'),
4    isArray = require('./isArray');
5
6/**
7 * Creates a function like `_.groupBy`.
8 *
9 * @private
10 * @param {Function} setter The function to set accumulator values.
11 * @param {Function} [initializer] The accumulator object initializer.
12 * @returns {Function} Returns the new aggregator function.
13 */
14function createAggregator(setter, initializer) {
15  return function(collection, iteratee) {
16    var func = isArray(collection) ? arrayAggregator : baseAggregator,
17        accumulator = initializer ? initializer() : {};
18
19    return func(collection, setter, baseIteratee(iteratee, 2), accumulator);
20  };
21}
22
23module.exports = createAggregator;
24