1 | "use strict";
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2 | module.exports = function(
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3 | Promise, INTERNAL, tryConvertToPromise, apiRejection) {
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4 | var util = require("./util");
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5 |
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6 | var raceLater = function (promise) {
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7 | return promise.then(function(array) {
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8 | return race(array, promise);
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9 | });
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10 | };
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11 |
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12 | function race(promises, parent) {
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13 | var maybePromise = tryConvertToPromise(promises);
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14 |
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15 | if (maybePromise instanceof Promise) {
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16 | return raceLater(maybePromise);
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17 | } else {
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18 | promises = util.asArray(promises);
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19 | if (promises === null)
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20 | return apiRejection("expecting an array or an iterable object but got " + util.classString(promises));
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21 | }
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22 |
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23 | var ret = new Promise(INTERNAL);
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24 | if (parent !== undefined) {
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25 | ret._propagateFrom(parent, 3);
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26 | }
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27 | var fulfill = ret._fulfill;
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28 | var reject = ret._reject;
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29 | for (var i = 0, len = promises.length; i < len; ++i) {
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30 | var val = promises[i];
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31 |
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32 | if (val === undefined && !(i in promises)) {
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33 | continue;
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34 | }
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35 |
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36 | Promise.cast(val)._then(fulfill, reject, undefined, ret, null);
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37 | }
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38 | return ret;
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39 | }
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40 |
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41 | Promise.race = function (promises) {
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42 | return race(promises, undefined);
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43 | };
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44 |
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45 | Promise.prototype.race = function () {
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46 | return race(this, undefined);
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47 | };
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48 |
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49 | };
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