rxjs

问题 I have an effect that should call two different APIs (API1 and API2). Here's the effect $LoadKpiMission = createEffect(() => this.actions$.pipe( ofType<any>(EKpiActions.GetMissionsByStation), mergeMap(action => this.apiCallsService.getKpi(action.payload, '2016-04-18').pipe( map(trips => ({ type: EKpiActions.GetMissionsSuccess, payload: trips })), catchError(() => EMPTY) ) ) ) ); Here's the structure of the service getKpi(station: number, date: string) { let Kpi = `http://192.168.208.25:8998

问题 Original promise based code I'm trying to rewrite: parentPromise .then((parentResult) => { childPromise1 .then(child1Result => child1Handler(parentResult, child1Result)); childPromise2 .then(child1Result => child2Handler(parentResult, child2Result)); childPromise3 .then(child1Result => child3Handler(parentResult, child3Result)); }); I'm trying to figure a way how to avoid the nested subscriptions anti-pattern in the following scenario: parent$ .pipe(takeUntil(onDestroy$)) .subscribe(

问题 Original promise based code I'm trying to rewrite: parentPromise .then((parentResult) => { childPromise1 .then(child1Result => child1Handler(parentResult, child1Result)); childPromise2 .then(child1Result => child2Handler(parentResult, child2Result)); childPromise3 .then(child1Result => child3Handler(parentResult, child3Result)); }); I'm trying to figure a way how to avoid the nested subscriptions anti-pattern in the following scenario: parent$ .pipe(takeUntil(onDestroy$)) .subscribe(

问题 Original promise based code I'm trying to rewrite: parentPromise .then((parentResult) => { childPromise1 .then(child1Result => child1Handler(parentResult, child1Result)); childPromise2 .then(child1Result => child2Handler(parentResult, child2Result)); childPromise3 .then(child1Result => child3Handler(parentResult, child3Result)); }); I'm trying to figure a way how to avoid the nested subscriptions anti-pattern in the following scenario: parent$ .pipe(takeUntil(onDestroy$)) .subscribe(

问题 node: v10.16.3 npm: 6.12.0 I got a error when I import express in node. I'm using this code https://github.com/angular-university/rxjs-course, look at server/server.ts . I run server.ts with $ ts-node ./server/server.ts The related code is: import * as express from 'express'; The error is: import * as express from 'express'; ^ SyntaxError: Unexpected token * at Module._compile (internal/modules/cjs/loader.js:723:23) at Module.m._compile (/usr/local/lib/node_modules/ts-node/src/index.ts:493:23

问题 In a lot of codebases using RxJS I seem to come across the pattern of exposing private Subjects as Observables via a getter or normal getObservable() function. My question is not why .asObservable() is used, but instead why it seems so commonly wrapped in a getter/factory function? asObservable() wrapped in getter/factory function private readonly _engineInfo$ = new Subject<EngineInfo>(); get engineInfo$() { return this._engineInfo$.asObservable(); } asObservable() as instance variable

问题 Can someone pls help Website, page is loading twice after using ModuleMapLoaderModule, if i dont using it source code not showing in angular 7 universal Im also getting low speed at google insight and gtmatrix const { AppServerModuleNgFactory, LAZY_MODULE_MAP } = require('./dist/server/main'); try { // * NOTE :: leave this as require() since this file is built Dynamically from webpack const { AppServerModuleNgFactory, LAZY_MODULE_MAP } = require('./dist/server/main'); const { MODULE_MAP } =

问题 Can someone pls help Website, page is loading twice after using ModuleMapLoaderModule, if i dont using it source code not showing in angular 7 universal Im also getting low speed at google insight and gtmatrix const { AppServerModuleNgFactory, LAZY_MODULE_MAP } = require('./dist/server/main'); try { // * NOTE :: leave this as require() since this file is built Dynamically from webpack const { AppServerModuleNgFactory, LAZY_MODULE_MAP } = require('./dist/server/main'); const { MODULE_MAP } =

问题 I am trying to understand rxjs (6) and how I should call conditionally make a second http post. My scenario is that: I am/have uploaded a file. I get an object identifying the current progress and a filename. If the current progress is 100 I want to make the second http post and on success of that second call return the progress and the filename If the current progress is less than 100 simply return the progress and filename My class export class BasePortalDetailsManagerService {

问题 I am trying to understand rxjs (6) and how I should call conditionally make a second http post. My scenario is that: I am/have uploaded a file. I get an object identifying the current progress and a filename. If the current progress is 100 I want to make the second http post and on success of that second call return the progress and the filename If the current progress is less than 100 simply return the progress and filename My class export class BasePortalDetailsManagerService {