source: trip-planner-front/node_modules/run-parallel/index.js@ 76712b2

Last change on this file since 76712b2 was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

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1/*! run-parallel. MIT License. Feross Aboukhadijeh <https://feross.org/opensource> */
2module.exports = runParallel
3
4const queueMicrotask = require('queue-microtask')
5
6function runParallel (tasks, cb) {
7 let results, pending, keys
8 let isSync = true
9
10 if (Array.isArray(tasks)) {
11 results = []
12 pending = tasks.length
13 } else {
14 keys = Object.keys(tasks)
15 results = {}
16 pending = keys.length
17 }
18
19 function done (err) {
20 function end () {
21 if (cb) cb(err, results)
22 cb = null
23 }
24 if (isSync) queueMicrotask(end)
25 else end()
26 }
27
28 function each (i, err, result) {
29 results[i] = result
30 if (--pending === 0 || err) {
31 done(err)
32 }
33 }
34
35 if (!pending) {
36 // empty
37 done(null)
38 } else if (keys) {
39 // object
40 keys.forEach(function (key) {
41 tasks[key](function (err, result) { each(key, err, result) })
42 })
43 } else {
44 // array
45 tasks.forEach(function (task, i) {
46 task(function (err, result) { each(i, err, result) })
47 })
48 }
49
50 isSync = false
51}
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