问如果json输出中的数组内有r数组，如何迭代JSON数据

EN

  </component.ts>
  /*this list component calls api to fetch deals from amazon*/
  import { Component, OnInit } from '@angular/core';

  /*importing services*/
  import { DealsService } from '../deals.service'


  @Component({
  selector: 'app-list',
  templateUrl: './list.component.html',
  styleUrls: ['./list.component.css']
  })

 export class ListComponent implements OnInit {
 public deals;

 constructor(public dealsHttpService : DealsService) {
 console.log('List component constructor is called');
 }

 ngOnInit() {
 console.log('List component onInit called');
  /*subscribing to observables*/
  this.dealsHttpService.getAmazonDeals().subscribe(
   data=>{
     console.log('logging data');
     this.deals = data["data"];
     console.log(this.deals)
   },
    /*handle error if not subscribed*/
     error => {
    console.log("some error occured");
    console.log(error.errorMessage);
  }
  )
   }



   }
    />


    </html template

      <td>{{single.amazon_data[0].Category}}</td>
      <td>{{single.amazon_data[0].Title}}</td>
      <td>{{single.amazon_data[0].Details}}</td>
     />