'forkJoin' is deprecated

   参考连接：https://stackoverflow.com/questions/52486786/forkjoin-is-deprecated-resultselector-is-deprecated-pipe-to-map-instead

forkJoin([

          this.orderService.getCourseList(), this.orderService.getRoomList(), this.orderService.getExamConfigList()

      ]).subscribe((res: any) => {

        if (res.length > 0) {

         

          });

      // forkJoin([this.orderService.getCourseList(), this.orderService.getRoomList(), this.orderService.getExamConfigList()]).pipe(

      //   map(x => resultSelector(...x))

      // )