root / HServer / 00.Server / 00.Program / node_modules / async / parallel.js
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| 1 | 39 | HKM | 'use strict';
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| 2 | |||
| 3 | Object.defineProperty(exports, "__esModule", {
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| 4 | value: true |
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| 5 | }); |
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| 6 | exports.default = parallelLimit;
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| 7 | |||
| 8 | var _eachOf = require('./eachOf'); |
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| 9 | |||
| 10 | var _eachOf2 = _interopRequireDefault(_eachOf);
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| 11 | |||
| 12 | var _parallel = require('./internal/parallel'); |
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| 13 | |||
| 14 | var _parallel2 = _interopRequireDefault(_parallel);
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| 15 | |||
| 16 | function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; } |
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| 17 | |||
| 18 | /**
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| 19 | * Run the `tasks` collection of functions in parallel, without waiting until
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| 20 | * the previous function has completed. If any of the functions pass an error to
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| 21 | * its callback, the main `callback` is immediately called with the value of the
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| 22 | * error. Once the `tasks` have completed, the results are passed to the final
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| 23 | * `callback` as an array.
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| 24 | *
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| 25 | * **Note:** `parallel` is about kicking-off I/O tasks in parallel, not about
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| 26 | * parallel execution of code. If your tasks do not use any timers or perform
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| 27 | * any I/O, they will actually be executed in series. Any synchronous setup
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| 28 | * sections for each task will happen one after the other. JavaScript remains
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| 29 | * single-threaded.
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| 30 | *
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| 31 | * It is also possible to use an object instead of an array. Each property will
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| 32 | * be run as a function and the results will be passed to the final `callback`
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| 33 | * as an object instead of an array. This can be a more readable way of handling
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| 34 | * results from {@link async.parallel}.
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| 35 | *
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| 36 | * @name parallel
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| 37 | * @static
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| 38 | * @memberOf module:ControlFlow
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| 39 | * @method
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| 40 | * @category Control Flow
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| 41 | * @param {Array|Iterable|Object} tasks - A collection containing functions to run.
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| 42 | * Each function is passed a `callback(err, result)` which it must call on
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| 43 | * completion with an error `err` (which can be `null`) and an optional `result`
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| 44 | * value.
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| 45 | * @param {Function} [callback] - An optional callback to run once all the
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| 46 | * functions have completed successfully. This function gets a results array
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| 47 | * (or object) containing all the result arguments passed to the task callbacks.
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| 48 | * Invoked with (err, results).
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| 49 | * @example
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| 50 | * async.parallel([
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| 51 | * function(callback) {
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| 52 | * setTimeout(function() {
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| 53 | * callback(null, 'one');
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| 54 | * }, 200);
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| 55 | * },
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| 56 | * function(callback) {
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| 57 | * setTimeout(function() {
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| 58 | * callback(null, 'two');
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| 59 | * }, 100);
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| 60 | * }
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| 61 | * ],
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| 62 | * // optional callback
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| 63 | * function(err, results) {
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| 64 | * // the results array will equal ['one','two'] even though
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| 65 | * // the second function had a shorter timeout.
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| 66 | * });
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| 67 | *
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| 68 | * // an example using an object instead of an array
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| 69 | * async.parallel({
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| 70 | * one: function(callback) {
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| 71 | * setTimeout(function() {
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| 72 | * callback(null, 1);
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| 73 | * }, 200);
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| 74 | * },
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| 75 | * two: function(callback) {
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| 76 | * setTimeout(function() {
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| 77 | * callback(null, 2);
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| 78 | * }, 100);
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| 79 | * }
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| 80 | * }, function(err, results) {
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| 81 | * // results is now equals to: {one: 1, two: 2}
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| 82 | * });
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| 83 | */
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| 84 | function parallelLimit(tasks, callback) { |
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| 85 | (0, _parallel2.default)(_eachOf2.default, tasks, callback); |
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| 86 | } |
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| 87 | module.exports = exports['default']; |