如何将两个可观察数组连接成一个数组？

Question

例:

var s1 = Observable.of([1, 2, 3]);

var s2 = Observable.of([4, 5, 6]);

s1.merge(s2).subscribe(val => {
   console.log(val);
})

我想得到[1,2,3,4,5,6]

代替

[1,2,3]

[4,5,6]

Answer 1

forkJoin 工作井,你只需要压扁阵列数组:

const { Observable } = Rx;

const s1$ = Observable.of([1, 2, 3]);
const s2$ = Observable.of([4, 5, 6]);

Observable
  .forkJoin(s1$, s2$)
  .map(([s1, s2]) => [...s1, ...s2])
  .do(console.log)
  .subscribe();

输出: [1, 2, 3, 4, 5, 6]

Plunkr演示:https://plnkr.co/edit/zah5XgErUmFAlMZZEu0k？p = preview

Answer 2

我的看法是使用Array.prototype.concat()进行zip和映射：

https://stackblitz.com/edit/rxjs-pkt9wv?embed=1&file=index.ts

import { zip, of } from 'rxjs';
import { map } from 'rxjs/operators';

const s1$ = of([1, 2, 3]);
const s2$ = of([4, 5, 6]);
const s3$ = of([7, 8, 9]);
...

zip(s1$, s2$, s3$, ...)
  .pipe(
    map(res => [].concat(...res)),
    map(res => res.sort())
  )
  .subscribe(res => console.log(res));