how to store API response in an array in angular - node.js

Question

i have a service that returns an API response of type json, in this json object i have a list of number values.i can output those values on my webpage, but i would like to store the values in an array first to do some calculations on. i have tried many ways without success. please guide me
API response screenshot in postman
http call service
getTriggerCount():Observable<Trigger>{
return this.http.get(this.triggersUrl).pipe(
flatMap(count => transformAndValidate(Trigger, count)))
component
#Component({
selector: 'app-triggers',
templateUrl: './triggers.component.html',
styleUrls: ['./triggers.component.css']
})
export class TriggersComponent implements OnInit {
#Input() trigger: Trigger;
constructor(private triggerService: DbApiService) { }
ngOnInit() {
this.getTriggerCount();
}
getTriggerCount(){
this.triggerService.getTriggerCount() .subscribe(trigger => this.trigger = trigger);
}
}
Trigger Class
import { IsNumber, IsNotEmpty, IsString } from 'class-validator';
export class Trigger {
#IsNotEmpty()
#IsNumber()
result: number[];
constructor() { }
}

Answer 1

The issue is with your service, it should be like the following
getTriggerCount():Observable<any>{
return this.http.get(this.triggersUrl).map(res => res.json());
}
Using the new HttpClient it should like like this:
getTriggerCount():Observable<any>{
return this.http.get<any>(this.triggersUrl);
}
To make use of this in the component. You also do not need the #Input() for trigger. Your Trigger class is also over complicated for what you are doing. See below
public trigger: any;
getTriggerCount(){
this.triggerService.getTriggerCount()
.subscribe(trigger => this.trigger = trigger);
}
This will then have the response on the trigger object. If you want to make use of the object, to say, add all the numbers together, you would do the following:
addArray() {
let sum = this.trigger.reduce((a, b) => +a + +b, 0);
}
The +a and +b is to convert the item to a number. This won't work if the item can't convert to a number.