HORIZON PROJECT

'use strict';

Object.defineProperty(exports, "__esModule", {

  value: true

});

exports.default = parallelLimit;

var _eachOf = require('./eachOf');

var _eachOf2 = _interopRequireDefault(_eachOf);

var _parallel = require('./internal/parallel');

var _parallel2 = _interopRequireDefault(_parallel);

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

/**

 * Run the `tasks` collection of functions in parallel, without waiting until

 * the previous function has completed. If any of the functions pass an error to

 * its callback, the main `callback` is immediately called with the value of the

 * error. Once the `tasks` have completed, the results are passed to the final

 * `callback` as an array.

 *

 * **Note:** `parallel` is about kicking-off I/O tasks in parallel, not about

 * parallel execution of code.  If your tasks do not use any timers or perform

 * any I/O, they will actually be executed in series.  Any synchronous setup

 * sections for each task will happen one after the other.  JavaScript remains

 * single-threaded.

 *

 * It is also possible to use an object instead of an array. Each property will

 * be run as a function and the results will be passed to the final `callback`

 * as an object instead of an array. This can be a more readable way of handling

 * results from {@link async.parallel}.

 *

 * @name parallel

 * @static

 * @memberOf module:ControlFlow

 * @method

 * @category Control Flow

 * @param {Array|Iterable|Object} tasks - A collection containing functions to run.

 * Each function is passed a `callback(err, result)` which it must call on

 * completion with an error `err` (which can be `null`) and an optional `result`

 * value.

 * @param {Function} [callback] - An optional callback to run once all the

 * functions have completed successfully. This function gets a results array

 * (or object) containing all the result arguments passed to the task callbacks.

 * Invoked with (err, results).

 * @example

 * async.parallel([

 *     function(callback) {

 *         setTimeout(function() {

 *             callback(null, 'one');

 *         }, 200);

 *     },

 *     function(callback) {

 *         setTimeout(function() {

 *             callback(null, 'two');

 *         }, 100);

 *     }

 * ],

 * // optional callback

 * function(err, results) {

 *     // the results array will equal ['one','two'] even though

 *     // the second function had a shorter timeout.

 * });

 *

 * // an example using an object instead of an array

 * async.parallel({

 *     one: function(callback) {

 *         setTimeout(function() {

 *             callback(null, 1);

 *         }, 200);

 *     },

 *     two: function(callback) {

 *         setTimeout(function() {

 *             callback(null, 2);

 *         }, 100);

 *     }

 * }, function(err, results) {

 *     // results is now equals to: {one: 1, two: 2}

 * });

 */

function parallelLimit(tasks, callback) {

  (0, _parallel2.default)(_eachOf2.default, tasks, callback);

}

module.exports = exports['default'];