1  'use strict';
 2  
 3  Object.defineProperty(exports, "__esModule", {
 4    value: true
 5  });
 6  
 7  var _eachLimit = require('./eachLimit');
 8  
 9  var _eachLimit2 = _interopRequireDefault(_eachLimit);
10  
11  var _awaitify = require('./internal/awaitify');
12  
13  var _awaitify2 = _interopRequireDefault(_awaitify);
14  
15  function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
16  
17  /**
18   * The same as [`each`]{@link module:Collections.each} but runs only a single async operation at a time.
19   *
20   * Note, that unlike [`each`]{@link module:Collections.each}, this function applies iteratee to each item
21   * in series and therefore the iteratee functions will complete in order.
22  
23   * @name eachSeries
24   * @static
25   * @memberOf module:Collections
26   * @method
27   * @see [async.each]{@link module:Collections.each}
28   * @alias forEachSeries
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
32   * item in `coll`.
33   * The array index is not passed to the iteratee.
34   * If you need the index, use `eachOfSeries`.
35   * Invoked with (item, callback).
36   * @param {Function} [callback] - A callback which is called when all
37   * `iteratee` functions have finished, or an error occurs. Invoked with (err).
38   * @returns {Promise} a promise, if a callback is omitted
39   */
40  function eachSeries(coll, iteratee, callback) {
41    return (0, _eachLimit2.default)(coll, 1, iteratee, callback);
42  }
43  exports.default = (0, _awaitify2.default)(eachSeries, 3);
44  module.exports = exports['default'];