FilesExpand file tree

 master

/

parallel.js

Copy path

Blame

More file actions

Blame

More file actions

Latest commit

 

History

History

History

90 lines (83 loc) · 3.03 KB

 master

/

parallel.js

Copy path

Top

File metadata and controls

• Code
• Blame

90 lines (83 loc) · 3.03 KB

Raw

Copy raw file

Download raw file

Open symbols panel

Edit and raw actions

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

75

76

77

78

79

80

81

82

83

84

85

86

87

88

89

90

'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.

*

* **Hint:** Use [`reflect`]{@link module:Utils.reflect} to continue the

* execution of other tasks when a task fails.

*

* 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 of

* [async functions]{@link AsyncFunction} to run.

* Each async function can complete with any number of optional `result` values.

* @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'];