deferred | 易学教程

Deferred pattern with RxJS 5 observables

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问题 For arbitrary promise implementation, the deferred pattern (not to be confused with antipattern) may may look like: const deferred = new Deferred; ... // scopes where `deferred` object reference was passed before promise settlement deferred.promise.then((result) => { ... }, (error) => { ... }); ... deferred.resolve(...); // doesn't affect promise state deferred.reject(); ... // after promise settlement deferred.promise.then((result) => { ... }, (error) => { ... }); deferred object holds

Why is my deferred object set to resolved instead of pending when calling a function that sets a new $.Deferred multiple times?

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问题 I'm trying to get jQuery deferred to work and am having some problems. My system is using postMessage to pass messages from and to sandboxed areas on a website. So when I request a service from a sandboxed area like this: // on click of button foo.requestService(options, function (response) { $("#c").val(response); // set value of input button } Internally, I'm creating a new $.deferred every time the button is clicked and the service is requested like so: that.requestService = $.fn

How to async way call 10 functions and collect all results and know when all are finished?

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问题 I am using deferred module for Node.js and I have created deferred functions which fetch data from distant server. I need to fetch 10 files from different distant server, how to do this with promise to know when all are finished and fetch all then results in array ? At the moment I have closure and I am fetching next file only when I have done with previous but it is sync and slow. 回答1: According to the documentation of what I assume is the module you're using, you can do this: deferred

stop a twisted reactor after a gatherResults has finished

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问题 new to twisted and just trying some deferred stuff out. I have the following code that makes up a list of 100 deferred calls - each waiting a random time and returning a value. That list the prints the results and finally terminates the reactor. However, I'm pretty sure the way I'm stopping the reactor is probably... not great. __author__ = 'Charlie' from twisted.internet import defer, reactor import random def getDummyData(x): """returns a deferred object that will have a value in some

How to simplify Q promise example

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问题 I was working on a simple application that makes sequential ajax calls, passing result of first call into the next one. Of course I don't want to go into the callback hell, and therefore look into Promises/A+ spec example and Q library. I have prepared an async function that should result in what I want. But I want an insight on how I can simplify the Sequential promise passing. For now I am still reading on how to best work with promises and deferred objects, so forgive me for the very naive

Deferred Promise - Run Functions One by One after each completes

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问题 I have 3 functions that make aync calls to backend systems : fnOne, fnTwo, fnThree. I know I am not doing it correctly, but cannot figure out the right way. I am starting off by trying to call them one by after each completes: However, fnOne already has a deferred object inside of it and when that is resolved it is resolving my promise. $.when(oController._fnOne()).done(function(){ console.log("fn one complete"); }); functions _fnOne: function(){ var oController = this; //when the deferred is

How to tell when multiple functions have completed with jQuery deferred

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问题 I have 3 functions which handle data pulled in from AJAX, they update the page after the ajax function is called. When the AJAX function is called I show a loader, I want to hide the loader after the AJAX has completed and the functions have completed. How can I use deferred with when and then in jQuery to test once all 3 function are completed. Here is my AJAX code, this hides the loader on AJAX success at the moment, ideally this would be after the 3 functions have been completed / were

Deferred binding failed GWT using uibinder

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Below are the total files used in project. It is giving these errors [ERROR] [cricketscore] - Deferred binding failed for 'test.client.UserDashboard.MyUiBinder'; expect subsequent failures and [ERROR] [cricketscore] - Unable to load module entry point class test.client.DashBoard (see associated exception for details). Please help me resolve the problem in it. Cricketscore.gwt.xml <?xml version="1.0" encoding="UTF-8"?>  <!DOCTYPE module

equivalent of $q.when in angular 2

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问题 I am used to using $q with angular 1. I am migrating to angular 2. Is there an equivalent that provide a .when() method ? for example I need to migrate this: .service('updateProDB', [ '$rootScope', 'connectionStatus', '$q', 'storageService', 'sendToServer', '$ionicPopup', function ($rootScope, connectionStatus, $q, storageService, sendToServer, $ionicPopup) { 'use strict'; var dbReadyDeferred = $q.defer(), prodata = [], prodataFieldNames = []; this.get = function () { var

Does Fortran 2003 implementation of deferred bound procedure requires same argument?

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问题 I tried to create inside a module an abstract type type, abstract :: AbsType contains procedure (Compute_AbsSize), deferred :: AbsSize end type AbsType abstract interface function Compute_AbsSize(this) import AbsType double precision Compute_AbsSize class(AbsType)::this end function Compute_AbsSize end interface type, extends(AbsType) :: ConcrType type(Var), dimension(4) :: Nodes ! coming from a module contains procedure :: AbsSize => ConcrTypeSize end type ConcrType contains function