如何从角4可观察到的响应中获得价值？

Question

我的问题是我得到的数据是可观察的，所以我检查数据是否 未定义，当它没有未定义时，我把它放入医生对象但是 我的一些代码在填充之前使用数据并生成错误，因为 value未定义如何获取变量中的响应值。

    workingDayFilter = ( d: Date ): boolean => {
    const day = d.getDay();
    let workingDays = this.doctor.workingDays;
    let result: boolean = false;

    for ( let i = 0; i < workingDays.length; i++ ) {
        if ( day == workingDays[i] ) {
            result = true;
        }
    }

    return result;

}


ngOnInit() {

    this.getDoctor();


    console.log( this.doctor );
    this.appointmentForm = this.formBuilder.group( {
        patientId: this.patientId,
        date: this.date,
        timeSlot: this.timeSlot
    } );

}
public getDoctor() {
    this.doctorService.getDoctorPublicInfo().subscribe(( data ) => {
        if ( data != undefined ) {
            this.doctor = data.json();
        }
    } );
}

Answer 1

尝试这样的事情

 ngOnInit() {

 this.getDoctor().subscribe((data) => {


    console.log(this.doctor);
    this.appointmentForm = this.formBuilder.group({
        patientId: this.patientId,
        date: this.date,
        timeSlot: this.timeSlot
    });
})

};
public getDoctor() {
 this.doctorService.getDoctorPublicInfo().map((resp) => {
    if (resp != undefined) {
        this.doctor = resp.json();
    }
});

}