我正试着把数字从大到小排序，但我没能成功。
我的代码对5位数的数字进行了完美的排序，但对其余的数字却没有。
下面是一个例子：

15366   
13070       
13069       
13068   
13067       
13066       
13065       
13064
313883
313880
313878
313876
313874
313872
313870
313869
313868

结果应为：

313883
313880
313878
313876
313874
313872
313870
313869
313868  
15366   
13070       
13069       
13068   
13067       
13066       
13065       
13064

我不明白为什么它不一次把所有的东西都分类？
模板

<ng-container *ngFor="let transfer of transferResponse.PRE">
   <ng-container *ngFor="let preptf of transfer.PREPTF">
      <tr>
         ...
         <td class="text-center">
            <a [routerLink]="['/transfers/customer-transfer-details/' + preptf.NUM]">{{preptf.NUM }} </a>
         </td>
         ...
      </tr>
   </ng-container>
</ng-container>

介面

export interface TransferResponse extends ApiResponse {
    PRE: Transfer[];
}

export interface Transfer {
    DEPO: number;
    CLER: string;
    INTITULE1: string;
    PHONE: string;
    PREPTF: {
        LABEL: string;
        TYPE: string;
        QUANTITE: number;
        STATUT: number; 
        NUM: number;
        ISIN: string;
        STATUT_LIB: string;
        REF_RBC: string;
    }[];
}

成分

export class OverviewTransfersComponent implements OnInit, OnDestroy {
   private unsubscribe$ = new Subject < void > ();
   currentAgency: any;
   transferResponse: TransferResponse;

   constructor(
      private service: OverviewTransfersService,
      private store: Store,
      private modalService: BsModalService,
      private router: Router

   ) {}

   ngOnInit(): void {
      this.currentAgency = this.store.selectSnapshot(AgencyState.currentAgency);
      if (this.currentAgency) {
         this.OverviewTransfers();
      }
   }

   ngOnDestroy(): void {
      this.unsubscribe$.next();
      this.unsubscribe$.complete();
   }

   OverviewTransfers(): void {
      console.log('Before the request service.OverviewTransfers()');
      this.service.OverviewTransfers().pipe(
         takeUntil(this.unsubscribe$)
      ).subscribe(res => {
         console.log('Response service.OverviewTransfers()', res);
         if (res.RETURNCODE === ApiResponseCodeEnum.Ok) {
            const transferResponse = res as TransferResponse;
            console.log('Before sorting', transferResponse);
            transferResponse.PRE.forEach(transfer => {
               transfer.PREPTF.sort((a, b) => {
                  return b.NUM - a.NUM;
               });
            });
            console.log('After sorting', transferResponse);
            this.transferResponse = transferResponse;
         }
      });
   }

}

控制台日志

响应服务。概述Transfers（）

排序服务之前。OverviewTransfers（）

排序服务后。OverviewTransfers（）

预先感谢你的帮助。