Question

Promise.all（）的RxJs等效项是什么，从而只有在解决所有诺言后，then块才会执行？

const request1 = this.http.get('/api/hello').toPromise() // returns a promise
const request2 = this.http.get('/api/there').toPromise() // returns a promise

Promise.all([request1, request2]).then(([response1, response2]) => {
  // executes if/when ALL the promises resolve
  console.log('response1', response1);
  console.log('response2', response2);
}).catch(err => {
  // executes if ANY ONE of the promises fail / reject
  console.log('err', err);
})

那么RxJ中的等效方法是什么？谢谢

Answer 1

您可以使用forkJoin

当您有一组可观测值和   只关心每个的最终发射值。你可以用这个   操作员发出多个请求。

从“ rxjs”导入{forkJoin，Observable} ；

用法

/Users/<my_username>/.rvm/gems/ruby-2.4.2/gems/bundler-1.16.6/lib/bundler/rubygems_integration.rb:462:in `block in replace_bin_path': can't find executable backup for gem backup. backup is not currently included in the bundle, perhaps you meant to add it to your Gemfile? (Gem::Exception)

RxJ相当于Promise.all（）

1 个答案: