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selector: 'app-example-normal',
templateUrl: './example-normal.component.html',
styleUrls: ['./example-normal.component.css']
export class ExampleNormalComponent implements OnInit, OnDestroy {
people: People;
planet: Planet;
private subPeople: Subscription;
private subPlanet: Subscription;
constructor(private http: HttpClient) {}
ngOnInit() {
this.subPeople = this.http
.subscribe((data: People) => {
this.people = data;
this.subPlanet = this.http
.subscribe((data: Planet) => {
this.planet = data;
ngOnDestroy() {
if (this.subPeople) {
if (this.subPlanet) {
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