10 examples of 'bluebird promise.each' in JavaScript

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181function all(promises) {
182 /*jshint maxcomplexity:8*/
183 var resolver = new Pending();
184 var pending = promises.length >>> 0;
185 var results = new Array(pending);
186
187 var i, h, x, s;
188 for (i = 0; i < promises.length; ++i) {
189 x = promises[i];
190
191 if (x === void 0 && !(i in promises)) {
192 --pending;
193 continue;
194 }
195
196 if (maybeThenable(x)) {
197 h = getHandlerMaybeThenable(x);
198
199 s = h.state();
200 if (s === 0) {
201 h.fold(settleAt, i, results, resolver);
202 } else if (s > 0) {
203 results[i] = h.value;
204 --pending;
205 } else {
206 unreportRemaining(promises, i+1, h);
207 resolver.become(h);
208 break;
209 }
210
211 } else {
212 results[i] = x;
213 --pending;
214 }
215 }
216
217 if(pending === 0) {
218 resolver.become(new Fulfilled(results));
219 }
220
221 return new Promise(Handler, resolver);
222
223 function settleAt(i, x, resolver) {
224 /*jshint validthis:true*/
225 this[i] = x;
226 if(--pending === 0) {
227 resolver.become(new Fulfilled(this));
228 }
229 }
230}
92function chainPromise(promises) {
93 var chain = Promise.resolve()
94 promises.forEach(function (promise) {
95 chain = chain.then(function (o) {
96 return typeof promise === 'function' ? promise(o) : promise
97 })
98 })
99 return chain
100}
31Promise.each = function Promise$Each(promises, fn) {
32 return PromiseReduce(promises, fn, null, INTERNAL);
33};
113export function promiseSeries(
114 tasks: Function[],
115 initial?: any
116): Promise {
117 return tasks
118 .reduce(
119 (current, next) => (current as any).then(next),
120 Promise.resolve(initial)
121 );
122}
162return new Promise(function promiseFn(resolve, reject) {
163 resolve(response);
164 reject('mock request failed');
165});
37public static whenAll(promises: Promise[], action: () => void) {
38 const pending = promises.filter(p => !p.isDone);
39 if (pending.length === 0) {
40 action();
41 }
42 else {
43 pending.forEach(p => {
44 p.whenDone.push(() => {
45 const index = pending.indexOf(p);
46 if (index >= 0)
47 pending.splice(index, 1);
48 if (pending.length === 0)
49 action();
50 });
51 });
52 }
53}
169Promise.all = function all(promiseList)
170{
171 var ret = new Promise(function (res, rej)
172 {
173 this.__rejector = rej;
174 this.__resolver = res;
175 this.__promiseList = promiseList;
176 this.__done = false;
177 this.__count = 0;
178 });
179
180 for (var i in promiseList)
181 {
182 promiseList[i].then(function ()
183 {
184 // Success
185 if(++ret.__count == ret.__promiseList.length)
186 {
187 ret.__done = true;
188 ret.__resolver(ret.__promiseList);
189 }
190 }, function (arg)
191 {
192 // Failure
193 if(!ret.__done)
194 {
195 ret.__done = true;
196 ret.__rejector(arg);
197 }
198 });
199 }
200 if (promiseList.length == 0)
201 {
202 ret.__resolver(promiseList);
203 }
204 return (ret);
205};
48async function parallel (promises) {
49 return await B.all(promises);
50}
29export function promiseOr(promises: Array>): Promise {
30 let resolved = false;
31 let rejected = 0;
32 return new Promise((resolve, reject) => {
33 for (const promise of promises) {
34 promise.then((res) => {
35 if (!resolved) {
36 resolved = true;
37 resolve(res);
38 }
39 }).catch(() => {
40 rejected++;
41 if (!resolved && rejected >= promises.length) reject();
42 });
43 }
44 });
45}
36export function eachParallelAndFinish(arr: T[], iteratorFn: (arg: T) =&gt; Promise<u>): Promise&lt;(U | Error)[]&gt; {
37 const result: (U | Error)[] = [];
38 let itemsLeft = arr.length;
39 return new Promise((resolve) =&gt; {
40 arr.forEach((item: T, i: number) =&gt; {
41 iteratorFn(item).then((val: U) =&gt; {
42 result[i] = val;
43 if (--itemsLeft === 0) {
44 return resolve(result);
45 }
46 }).catch((err: Error) =&gt; {
47 result[i] = err;
48 if (--itemsLeft === 0) {
49 return resolve(result);
50 }
51 });
52 });
53 });
54}</u>

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