name : _createAggregator.js var arrayAggregator = require('./_arrayAggregator'), baseAggregator = require('./_baseAggregator'), baseIteratee = require('./_baseIteratee'), isArray = require('./isArray'); /** * Creates a function like `_.groupBy`. * * @private * @param {Function} setter The function to set accumulator values. * @param {Function} [initializer] The accumulator object initializer. * @returns {Function} Returns the new aggregator function. */ function createAggregator(setter, initializer) { return function(collection, iteratee) { var func = isArray(collection) ? arrayAggregator : baseAggregator, accumulator = initializer ? initializer() : {}; return func(collection, setter, baseIteratee(iteratee, 2), accumulator); }; } module.exports = createAggregator;