'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _eachLimit = require('./eachLimit');

var _eachLimit2 = _interopRequireDefault(_eachLimit);

var _awaitify = require('./internal/awaitify');

var _awaitify2 = _interopRequireDefault(_awaitify);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

/**
 * The same as [`each`]{@link module:Collections.each} but runs only a single async operation at a time.
 *
 * Note, that unlike [`each`]{@link module:Collections.each}, this function applies iteratee to each item
 * in series and therefore the iteratee functions will complete in order.

 * @name eachSeries
 * @static
 * @memberOf module:Collections
 * @method
 * @see [async.each]{@link module:Collections.each}
 * @alias forEachSeries
 * @category Collection
 * @param {Array|Iterable|AsyncIterable|Object} coll - A collection to iterate over.
 * @param {AsyncFunction} iteratee - An async function to apply to each
 * item in `coll`.
 * The array index is not passed to the iteratee.
 * If you need the index, use `eachOfSeries`.
 * Invoked with (item, callback).
 * @param {Function} [callback] - A callback which is called when all
 * `iteratee` functions have finished, or an error occurs. Invoked with (err).
 * @returns {Promise} a promise, if a callback is omitted
 */
function eachSeries(coll, iteratee, callback) {
  return (0, _eachLimit2.default)(coll, 1, iteratee, callback);
}
exports.default = (0, _awaitify2.default)(eachSeries, 3);
module.exports = exports['default'];