1  'use strict';
 2  
 3  Object.defineProperty(exports, "__esModule", {
 4    value: true
 5  });
 6  exports.default = groupBy;
 7  
 8  var _groupByLimit = require('./groupByLimit');
 9  
10  var _groupByLimit2 = _interopRequireDefault(_groupByLimit);
11  
12  function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
13  
14  /**
15   * Returns a new object, where each value corresponds to an array of items, from
16   * `coll`, that returned the corresponding key. That is, the keys of the object
17   * correspond to the values passed to the `iteratee` callback.
18   *
19   * Note: Since this function applies the `iteratee` to each item in parallel,
20   * there is no guarantee that the `iteratee` functions will complete in order.
21   * However, the values for each key in the `result` will be in the same order as
22   * the original `coll`. For Objects, the values will roughly be in the order of
23   * the original Objects' keys (but this can vary across JavaScript engines).
24   *
25   * @name groupBy
26   * @static
27   * @memberOf module:Collections
28   * @method
29   * @category Collection
30   * @param {Array|Iterable|AsyncIterable|Object} coll - A collection to iterate over.
31   * @param {AsyncFunction} iteratee - An async function to apply to each item in
32   * `coll`.
33   * The iteratee should complete with a `key` to group the value under.
34   * Invoked with (value, callback).
35   * @param {Function} [callback] - A callback which is called when all `iteratee`
36   * functions have finished, or an error occurs. Result is an `Object` whoses
37   * properties are arrays of values which returned the corresponding key.
38   * @returns {Promise} a promise, if no callback is passed
39   * @example
40   *
41   * async.groupBy(['userId1', 'userId2', 'userId3'], function(userId, callback) {
42   *     db.findById(userId, function(err, user) {
43   *         if (err) return callback(err);
44   *         return callback(null, user.age);
45   *     });
46   * }, function(err, result) {
47   *     // result is object containing the userIds grouped by age
48   *     // e.g. { 30: ['userId1', 'userId3'], 42: ['userId2']};
49   * });
50   */
51  function groupBy(coll, iteratee, callback) {
52    return (0, _groupByLimit2.default)(coll, Infinity, iteratee, callback);
53  }
54  module.exports = exports['default'];