/Javascript/AngularJS/Angular wait all subscriptions

Angular wait all subscriptions

// Concat 
let first = Observable.timer(10,500).map(r => {
  return {source:1,value:r};
}).take(4);
let second = Observable.timer(10,500).map(r => {
  return {source:2,value:r};
}).take(4);
first.concat(second).subscribe(res => this.concatStream.push(res));
// This will merge the two but you will receive the first observable result before the second:
// 0 1 2 3 0 1 2 3

// Merge
let first = Observable.timer(10,500).map(r => {
  return {source:1,value:r};
}).take(4);
let second = Observable.timer(10,500).map(r => {
  return {source:2,value:r};
}).take(4);
first.merge(second).subscribe(res => this.mergeStream.push(res));

// You will get:
// 0 0 1 1 2 2 3 3

// Fork Join
let first = Observable.of({source:1,value:1});
let second = Observable.of({source:2,value:1});
Observable.forkJoin(first,second).subscribe((res:Array) => this.forkJoinStream = res);

// FlatMap
let first = Observable.of(10);
first.flatMap((operand1) => {
  return Observable.of(operand1 + 10);
})
.subscribe(res => this.flatMappedStreams = {msg: '10 + 10 = ' + res});

Source: stackoverflow.com

Similar codes

0 vote204 views1 answer
Can we get the value of form control after disabling it angular
Javascript AngularJS
0 vote183 views1 answer
Bootstrap dropdown not working in angular 8
Javascript AngularJS
4 votes185 views1 answer
Downgrade angular version in project
Javascript AngularJS
0 vote188 views2 answers
Properly import mat icon angular 10
Javascript AngularJS
5 votes198 views1 answer
Angular input press enter
Javascript AngularJS
0 vote194 views1 answer
Mac address validation regex angular
Javascript AngularJS
8 votes186 views3 answers
Angular [routerlink]
Javascript AngularJS
0 vote198 views1 answer
Update nested formgroup angular
Javascript AngularJS
0 vote186 views1 answer
Angular property binding
Javascript AngularJS
0 vote182 views1 answer
Ngswitchcase in angular 8
Javascript AngularJS