为什么`combineLatest`返回OperatorFunction< {}，number> [英] Why `combineLatest` returns OperatorFunction<{}, number>

问题描述

我正在使用 RxJS 6 ，我的代码中有两个可观察对象

I am using RxJS 6 I have two observables in my code

import { combineLatest } from 'rxjs/operators';

loading$: Observable<boolean>;
loaded$: Observable<boolean>;

可观察对象不是来自 http 请求，而是来自 store

The observables are not coming from http request but from the store

我需要根据以下逻辑将序列组合/转换为一个可观察的值:
如果序列 true ， true 或 false ， false -需要返回新的可观察到的 true ，否则需要返回 false

I need to combine/convert the sequences into one single observable value based on this logic:
If the sequence true, true or false, false - need to return new observable true otherwise need to return false

我试图使用 combineLatest 来实现这一目标:

I tried to use combineLatest to achieve that:

combineLatest(
    this.loaded$, this.loading$,
    (val1, val2) => Number(val1) + Number(val2) === 1
)

但是问题是我的 combineLatest 返回'OperatorFunction<> 而不是 Observable<> ，所以我无法订阅.您对如何解决这个问题有任何想法吗?还是可以采用其他方法?

But the problem is that my combineLatest returns 'OperatorFunction<> and not Observable<> so I cannot subscribe. Do you have any ideas on how to fix that? Or if there is another approach that can be taken?

更新:
似乎是我的问题的答案 import {CombineLatest} from'RxJS';
目前正在测试

UPDATE:
Seems like that is the answer to my question import { combineLatest } from 'RxJS';
currently testing

推荐答案

使用RxJS 5.5的可能性最大，因为您需要使用来自 rxjs/operators 的 combineLatest 将其用作可观察的创建方法"，这意味着您需要使用 rxjs/observable/combineLatest .

With RxJS 5.5 it's most likely because you're using combineLatest from rxjs/operators while you want to use it as an Observable "creation method" which means you need to use rxjs/observable/combineLatest.

我的意思是你需要使用这个:

I mean you need to use this:

import { combineLatest } from 'rxjs/observable/combineLatest';

...代替这个:

import { combineLatest } from 'rxjs/operators';

编辑:由于您提到使用RxJS 6，因此可以从 rxjs 导入静态变体.

Since you mentioned you're using RxJS 6 you can import the static variant from rxjs.

import { combineLatest } from 'rxjs';

如果您正在寻找 combineLatest 运算符，则必须像这样导入它:

If you're looking for combineLatest operator you have to import it like this:

import { combineLatest } from 'rxjs/operators';

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