'use strict';
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.default = series;
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var _parallel = require('./internal/parallel');
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var _parallel2 = _interopRequireDefault(_parallel);
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var _eachOfSeries = require('./eachOfSeries');
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var _eachOfSeries2 = _interopRequireDefault(_eachOfSeries);
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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/**
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* Run the functions in the `tasks` collection in series, each one running once
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* the previous function has completed. If any functions in the series pass an
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* error to its callback, no more functions are run, and `callback` is
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* immediately called with the value of the error. Otherwise, `callback`
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* receives an array of results when `tasks` have completed.
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*
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* It is also possible to use an object instead of an array. Each property will
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* be run as a function, and the results will be passed to the final `callback`
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* as an object instead of an array. This can be a more readable way of handling
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* results from {@link async.series}.
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*
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* **Note** that while many implementations preserve the order of object
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* properties, the [ECMAScript Language Specification](http://www.ecma-international.org/ecma-262/5.1/#sec-8.6)
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* explicitly states that
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*
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* > The mechanics and order of enumerating the properties is not specified.
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*
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* So if you rely on the order in which your series of functions are executed,
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* and want this to work on all platforms, consider using an array.
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*
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* @name series
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* @static
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* @memberOf module:ControlFlow
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* @method
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* @category Control Flow
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* @param {Array|Iterable|Object} tasks - A collection containing
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* [async functions]{@link AsyncFunction} to run in series.
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* Each function can complete with any number of optional `result` values.
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* @param {Function} [callback] - An optional callback to run once all the
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* functions have completed. This function gets a results array (or object)
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* containing all the result arguments passed to the `task` callbacks. Invoked
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* with (err, result).
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* @example
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* async.series([
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* function(callback) {
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* // do some stuff ...
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* callback(null, 'one');
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* },
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* function(callback) {
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* // do some more stuff ...
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* callback(null, 'two');
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* }
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* ],
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* // optional callback
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* function(err, results) {
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* // results is now equal to ['one', 'two']
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* });
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*
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* async.series({
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* one: function(callback) {
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* setTimeout(function() {
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* callback(null, 1);
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* }, 200);
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* },
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* two: function(callback){
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* setTimeout(function() {
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* callback(null, 2);
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* }, 100);
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* }
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* }, function(err, results) {
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* // results is now equal to: {one: 1, two: 2}
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* });
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*/
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function series(tasks, callback) {
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(0, _parallel2.default)(_eachOfSeries2.default, tasks, callback);
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}
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module.exports = exports['default'];
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