javascript - Why my promise cant resolve? -

-

i have got 2 promises. 1 not being resolved , dont know why.

processtradeoffer: chain of promises tries procced object called 'offer'. identifyoffer return var "valida" | "aceptable" | "denegable". if 'valida' need identify items offer. need async function identifyitems(offer) return var 'offerstate' "denegable" | "aceptable" , can decline or accept offer.

i know problem there not in statement (offerstate == 'valida'). code:

const processtradeoffer = function(offer) {     return new promise(function(resolve, reject) {         identyoffer(offer)             .then(function(offerstate) {                 return finishtradeoffer(offer, offerstate);             }).then(function() {                 console.log('aqui');                 return resolve();             })     }) } const finishtradeoffer = function(offer, offerstate) {      return new promise(function(resolve, reject) {         if (offerstate == 'aceptable') {             accepttradeoffer(offer).then(function() {                 return resolve();             })         } else if (offerstate == 'denegable') {             declinetradeoffer(offer).then(function() {                 console.log('here');                 return resolve();             })         } else if (offerstate == 'valida') {             identifyitems(offer).then(function(offerstate) {                 finishtradeoffer(offer, offerstate);             })         }     }) }

console.log('here') fired succesfully , console.log('aqui') dont.

please write code follows.

const processtradeoffer = function(offer) {   const result = identyoffer(offer)     .then(offerstate => finishtradeoffer(offer, offerstate))    result.then(() =>  console.log('aqui'));    return result;  };  const finishtradeoffer = function(offer, offerstate) {   switch(offerstate) {     case 'aceptable': return accepttradeoffer(offer);      case 'denegable': {       const result = declinetradeoffer(offer);       result.then(() => console.log('here'));       return result;      case 'valida':       return identifyitems(offer)         .then(offerstate => finishtradeoffer(offer, offerstate));      default:        throw "invalid value offerstate!!";   } };

the basic point handle case of valida in such way promise resolves. in addition, we've gotten rid of "explicit promise constructor anti-pattern".


Comments

Post a Comment

Popular posts from this blog

ios - MKAnnotationView layer is not of expected type: MKLayer -

-
Image
so code works fine logger riddled message. there way rid of or suppress it? postannotation.swift class postannotation: mkpointannotation { //mark: properties let post: post //mark: initialization init(post: post) { self.post = post super.init() self.coordinate = cllocationcoordinate2d(latitude: post.latitude, longitude: post.longitude) self.title = post.title self.subtitle = post.timestring() } } adding annotation let annotation = postannotation(post: post) self.map.addannotation(annotation) func mapview func mapview(_ mapview: mkmapview, viewfor annotation: mkannotation) -> mkannotationview? { if annotation mkuserlocation { return nil } var annotationview = mapview.dequeuereusableannotationview(withidentifier: "pin") as? mkpinannotationview if annotationview == nil { annotationview = mkpinannotationview(annotation: annotation, reuseidentifier: "pin")
Read more

ZeroMQ on Windows, with Qt Creator -

-
i have installed zmq link given below on windows 7. http://zeromq.org/distro:microsoft-windows 1) have c++ project in qt-creator , i'm using zmq c++ binding (zhelpers.hpp etc). 2) have added .lib installed zmq folder qtcreator 3) while compiling, compiler looks _imp__zmq_verion, in .dll files present in .lib have __imp_zmq_version. 4) causing undefined reference zmq_version. anyone else faced problem , has solution ?
Read more

unity3d - Unity SceneManager.LoadScene quits application -

-
i have 2 different scenes 1 named 'main' , other 'game' both added scenes in load. when use scenemanager.loadscene("game"); works no problem when tried return main scene code if (input.getkeydown (keycode.escape)) { scenemanager.loadscene("main"); } strangely game quits. thanks. sorry interruption. somewhere on other script found code. if (input.getkeydown (keycode.escape)) { application.quit (); } that's bad, know...
Read more