小编car*_*ant的帖子

ngrx/Store和reducer都是新手.基本上,我有这个减速器:

import {StoreData, INITIAL_STORE_DATA} from "../store-data";
import {Action} from "@ngrx/store";
import {
  USER_THREADS_LOADED_ACTION, UserThreadsLoadedAction, SEND_NEW_MESSAGE_ACTION,
  SendNewMessageAction
} from "../actions";
import * as _ from "lodash";
import {Message} from "../../shared-vh/model/message";
import {ThreadsService} from "../../shared-vh/services/threads.service";

export function storeData(state: StoreData = INITIAL_STORE_DATA, action: Action): StoreData {


  switch (action.type) {

    case SEND_NEW_MESSAGE_ACTION:
      return handleSendNewMessageAction(state, action);

    default:
      return state
  }
}

function handleSendNewMessageAction(state:StoreData, action:SendNewMessageAction): StoreData {

  const newStoreData = _.cloneDeep(state);

  const currentThread = newStoreData.threads[action.payload.threadId];

  const newMessage: Message = {
    text: action.payload.text,
    threadId: action.payload.threadId,
    timestamp: new …

想知道你是否可以提供一些帮助.我似乎得到自己当涉及到使用有点困惑catch与Observable秒.

基本上我要做的是以下内容:当我的API返回403错误时,我想对我执行一些操作TokenStore,即删除本地令牌并将用户标记为未经身份验证.我试图这样做的方式可能是错误的,所以请告诉我是否有更好的方法来实现这一点.

我正在尝试使用以下代码完成此操作:

APIConnector.service.ts - API通信方法的单一服务

import {Injectable} from 'angular2/core';
import {Http, Response, Headers, RequestOptions} from 'angular2/http';
import {Observable}     from 'rxjs/Observable';
import * as _ from 'lodash';
import {Logger}     from './logger.service';
import {TokenStore} from '../stores/token.store';

@Injectable()
export class APIConnector {

    private _apiUrl:string = 'https://api.sb.zerojargon.com/';
    private _token:string = null;

    constructor(
        private _http:Http,
        private _logger:Logger,
        private _tokenStore:TokenStore
    ) {}

    get(endpoint:String, includes:Array<string>) {
        let includeString = (!_.isUndefined(includes)) ? this._parseIncludes(includes) : '';
        let headers = this._createHeaders();
        let options …

我已经阅读了关于这个问题的几个问题和答案但是无法解决它.

我正在使用Ionic2,我有一个方法可以从Firebase Database v3中检索数据.我不明白为什么我在控制台中出现以下错误ionic serve:

Error TS2345: Argument of type '(snap: DataSnapshot) => void' is not assignable to parameter of type '(a: DataSnapshot) => boolean'.
  Type 'void' is not assignable to type 'boolean'.

这是方法:

constructor(private http: Http) {

    firebase.database().ref('users').orderByChild("id").on("value", function(snapshot){
                    let items = [];
                    snapshot.forEach(snap => {
                        items.push({
                            uid: snap.val().uid,
                            username: snap.val().username,
                        });
                    });
                });
            }
}

我试图使用rxjs 5在TypeScript中编写Node.js服务器,但是在转换fs.readFile为rxjs表单时遇到错误.我希望以下代码可以在TypeScript中使用

// This is a JavaScript example from the official documentation. It should
// also work at the TypeScript envrionment.

import * as fs from 'fs';
import { Observable } from 'rxjs';

let readFileAsObservable = Observable.bindNodeCallback(fs.readFile);

// This is the line that throws the error.
let result = readFileAsObservable('./roadNames.txt', 'utf8');

result.subscribe(x => console.log(x), e => console.error(e));

但是,当我添加第二个参数时,我的编辑器会报告TypeScript错误 'utf-8'

Supplied parameters do not match any signature of call target.

我试图找到如何使用fs.readFile()in rxjs和TypeScript 的指南,但没有太多运气.

更新到TypeScript 2.4.1后,编译使用Actionsobservable from @ngrx/effects(版本2.0.3)的项目会看到抛出以下错误:

Error TS2684: The 'this' context of type 'Actions' is not assignable to method's 'this' of type 'Observable<any>'.
Error TS7006: Parameter 'action' implicitly has an 'any' type.
Error TS2345: Argument of type 'Actions' is not assignable to parameter of type 'Observable<Action>'.
  Types of property 'lift' are incompatible.
    Type '(operator: Operator<any, Action>) => Observable<Action>' is not assignable to type '<R>(operator: Operator<Action, R>) => Observable<R>'.
      Types of parameters 'operator' and 'operator' are incompatible.
        Type 'Operator<Action, R>' …

当使用 chai 进行单元测试时，我不断收到此错误消息，并且没有一个测试通过，即使它们应该通过。在这种情况下这意味着什么？谢谢。

var chai = require('chai');
var chaiHttp = require('chai-http');
var server = require('../server.js');

var should = chai.should();
var app = server.app;
var storage = server.storage;

chai.use(chaiHttp);

describe('Shopping List', function() {
  it('should list items on GET', function(done) {
chai.request(app)
  .get('/items')
  .end(function(err, res) {
    res.should.have.status(200);
    res.should.be.json; // jshint ignore:line
    res.body.should.be.a('array');
    res.body.should.have.length(3);
    res.body[0].should.be.a('object');
    res.body[0].should.have.property('id');
    res.body[0].should.have.property('name');
    res.body[0].id.should.be.a('number');
    res.body[0].name.should.be.a('string');
    res.body[0].name.should.equal('Broad beans');
    res.body[1].name.should.equal('Tomatoes');
    res.body[2].name.should.equal('Peppers');
    done();
  });
   });

完整错误消息：

1) Shopping List should list items on GET:
     TypeError: Cannot read property 'address' of undefined
      at …

我正在尝试在我的package.json中添加lint-fix。我的基本皮棉是"lint": "eslint --ext .js,.vue src test/unit/specs test/e2e/specs"

我确实尝试过，"lint-fix": "eslint --fix --ext .js,.vue src test/unit/specs test/e2e/specs"但是它抛出了我的错误，但没有修复它们。

我必须改变什么？

NPM的错误是：

217 problems (217 errors, 0 warnings)
npm ERR! Windows_NT 10.0.14393
npm ERR! argv "C:\\Program Files\\nodejs\\node.exe" "C:\\Program Files\\nodejs\\node_modules\\npm\\bin\\npm-cli.js" "run-script" "lint-fix"
npm ERR! node v5.10.1
npm ERR! npm v3.8.3
npm ERR! code ELIFECYCLE
npm ERR! quasar-app@0.0.1 lint-fix: eslint --fix --ext .js,.vue src
npm ERR! Exit status 1
npm ERR! but it is caused by exit code 1 which is result of finding …

我正在尝试创建一个删除函数,它将从Firebase中删除我的对象.

我在FireBase上有以下结构:

recipes   recipebooks      recipesPerRecipebook
  - id          - id        - recipebook_id
  - id          - id           - recipe_id: true

当我点击删除我要删除我想要做的就是recipe_id从recipes和也删除 recipesPerRecipebook/${recipebook_id}

我在recipes.service.ts中创建了一个函数

deleteRecipe(recipe_id:string, recipebook_id:string) {
    this.sdkDb.child('recipes').remove(recipe_id)
      .then(
        () => alert('recipe deletion requested !')
      );

    this.sdkDb.child('recipesPerRecipebook/${recipebook_id}').remove(recipe_id)
      .then(
        () => alert('recipe Association deletion requested !')
      );
  }

然后我在recipeDetails.component.ts中有这个

delete() {
    this.recipesService.deleteRecipe(this.recipe.$key, this.recipe.recipebook_id);
  }

我收到以下错误:

error_handler.js:54 Error: Firebase.remove failed: first argument must be a valid function.

我有两个问题,首先是最重要的是我哪里出错了.其次做this.sdkdb.child(...两次感觉有点不对劲,我可以简化这个吗？

我正在尝试 browserify，我的项目目录中有以下文件

• node_models/.bin - browserify 所在的位置

• 示例.js

  module.exports = 'Hello, world';
  

  Run Code Online (Sandbox Code Playgroud)

• 索引.js

  window.alert(require('./sample'));
  

  Run Code Online (Sandbox Code Playgroud)

有人可以帮助我如何使用 browserify 运行它吗？我正在使用 Windows。

我正在使用Angular 2中的Portal.在登录时,我向服务器发出请求以获取登录的用户配置文件.获取用户配置文件的方法返回一个observable,它在应用程序加载时在6个不同的位置订阅.

如果我使用了cold observable,这将导致对服务器的6个API调用.所以我通过添加.publishLast().refCount()切换到热观察.

这导致单个请求共享数据,因为用户配置文件不会在后续请求中更新.

问题从这里开始:

现在我有一个编辑配置文件功能,它通过HTTP PUT更新用户配置文件,因此,我想使先前订阅的Observables到期并以某种方式再次触发序列,以便再次执行API并且订阅接收更新的数据.

有什么方法可以重新启动/重新触发已订阅的可观察序列吗？

这是fetch用户可观察的代码

fetch(){
    this.userObservable = Observable.fromPromise(this.getToken())
      .switchMap(token => {
        let headers = new Headers();
        headers.append('Authorization', `Bearer ${token}`);
        return this.http.get('/api/v1/admin/users/me?includes=role', {headers: headers})
      })
      .map((res: Response) => {
        let retVal: any = {
          data: new Deserializer({
            keyForAttribute: 'camelCase'
          }).deserialize(res.json())
        };
        this.user = retVal.data as MpUser;
        this.user.role = MpRoles[retVal.data.role[0].name];
        return this.user;
      })
      .publishLast()
      .refCount();
  }