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			50 lines
		
	
	
		
			1.2 KiB
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
			
		
		
	
	
			50 lines
		
	
	
		
			1.2 KiB
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
| "use strict";
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| module.exports = function(
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|     Promise, INTERNAL, tryConvertToPromise, apiRejection) {
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| var util = require("./util");
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| 
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| var raceLater = function (promise) {
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|     return promise.then(function(array) {
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|         return race(array, promise);
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|     });
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| };
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| 
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| function race(promises, parent) {
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|     var maybePromise = tryConvertToPromise(promises);
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| 
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|     if (maybePromise instanceof Promise) {
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|         return raceLater(maybePromise);
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|     } else {
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|         promises = util.asArray(promises);
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|         if (promises === null)
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|             return apiRejection("expecting an array or an iterable object but got " + util.classString(promises));
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|     }
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| 
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|     var ret = new Promise(INTERNAL);
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|     if (parent !== undefined) {
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|         ret._propagateFrom(parent, 3);
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|     }
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|     var fulfill = ret._fulfill;
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|     var reject = ret._reject;
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|     for (var i = 0, len = promises.length; i < len; ++i) {
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|         var val = promises[i];
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| 
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|         if (val === undefined && !(i in promises)) {
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|             continue;
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|         }
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| 
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|         Promise.cast(val)._then(fulfill, reject, undefined, ret, null);
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|     }
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|     return ret;
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| }
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| 
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| Promise.race = function (promises) {
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|     return race(promises, undefined);
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| };
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| 
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| Promise.prototype.race = function () {
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|     return race(this, undefined);
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| };
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| 
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| };
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