我如何将 json 响应 object 的特定数据类型存储在数组中（例如：数字）以将数据源作为变量传递

Question

export class AppComponent implements OnInit {
    title: String = "Heatmap";
  
    constructor(private app:AppServiceService) { }
    ngOnInit(): void {
        this.app.getdata().subscribe
        (
            (response)=>{console.log(response)}       
        )
    }
   

    dataSource: Object []= [
    [1, this.num.value, 9, 23, 0, 39, 0],
    [0, 18, 37, 0, 0, 50, 0]
    
    ];
    
 
    
   
}

Answer 1

Declare the type somewhere in your app, for example in your service:

import { Injectable } from "@angular/core";
import { Observable, of } from "rxjs";

export interface GetDataResponse {
    data: number[]
}


@Injectable()
export class AppService {
    public getData(): Observable<GetDataResponse> {
        return of({ data: [1, 2, 3, 4] });
    }
}

Then use it in your subscribe parameter:

ngOnInit() {
    this.appService.getData().subscribe((response: GetDataResponse) => {
      console.log(response);
    })
  }

If the response has a simple type, you can just use it directly:

ngOnInit() {
    this.appService.getData().subscribe((response: {data: number[]}) => {
      console.log(response);
    })
}