/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

1 vote301 views1 answer
Update angular to specific version
Javascript AngularJS
2 votes252 views1 answer
If 'mat-step' is an Angular component,
Javascript AngularJS
0 vote303 views1 answer
Jszip angular
Javascript AngularJS
2 votes272 views2 answers
Angularjs 1.5.6 cdn
Javascript AngularJS
3 votes258 views2 answers
A class member cannot have the 'const' keyword angular
Javascript AngularJS
0 vote272 views1 answer
Hashtag strategy angular
Javascript AngularJS
0 vote285 views1 answer
Ng2 validations angular using reactiveforms
Javascript AngularJS
8 votes219 views3 answers
Angular [routerlink]
Javascript AngularJS
0 vote262 views2 answers
Same file select angular second time not selected
Javascript AngularJS
1 vote266 views1 answer
If condition for click in angular
Javascript AngularJS