在Angular 6中，forkJoin不能处理URL和POST对象的动态数组

import { Observable, forkJoin } from 'rxjs';
import { HttpClient } from '@angular/common/http';

...

// 假设urls和postObjects是动态的URL和POST对象数组
const urls: string[] = ['url1', 'url2', 'url3'];
const postObjects: any[] = [{...}, {...}, {...}];

// 将URL数组转换为Observable数组
const urlObservables: Observable<any>[] = urls.map(url => this.http.get(url));

// 将POST对象数组转换为Observable数组
const postObservables: Observable<any>[] = postObjects.map(postObj => this.http.post('url', postObj));

// 合并URL和POST对象的Observable数组
const mergedObservables: Observable<any>[] = urlObservables.concat(postObservables);

// 使用forkJoin合并Observable数组为一个Observable对象
forkJoin(mergedObservables).subscribe(results => {
  // 处理合并后的数据
  console.log(results);
}, error => {
  // 处理错误
  console.error(error);
});