角度导入和导出常量

Question

我正在编写本教程，似乎代码或我正在使用的版本存在一些问题。

我正在尝试导入常量。 但是，它没有找到常量。下面有红线 arrGender：Array;， arrOccupation：数组; 等

//3. import all constants
import {
    Occupations,
    JobTypes,
    Genders,
    Hobbies,
    MartialStatuses,
    ResidentTypes,
    Qualifications
} from './constData';

    export class PersonalInformationComponent implements OnInit {
    // 7a. Define the properties for databinding
    person: Person;
    persons: Array<Person>;
    arrGender: Array;
    arrOccupation: Array<Occupations>;
    arrJobType: Array<JobTypes>;
    arrQualification: Array<Qualifications>;
    arrHobbies: Array<Hobbies>;
    arrMartialStatus: Array<MartialStatuses>;
    arrResidentialType: Array<ResidentTypes>;
    canChange: boolean; 
    canEdit: boolean;
    tableHeaders: Array;

    constructor(private pServ: PersonalInfoService) {
        this.canChange = false;
        this.canEdit = false;
        this.tableHeaders = new Array();
        this.person = new Person();
        this.persons = new Array();
        this.arrGender = new Array();
    }

Answer 1

//3. import all constants
import {
    Occupations,
    JobTypes,
    Genders,
    Hobbies,
    MartialStatuses,
    ResidentTypes,
    Qualifications
} from './constData';

export class PersonalInformationComponent implements OnInit {
  // 7a. Define the properties for databinding
  person: Person;
  persons: Array<Person>;
  // You forgot to add the type to the Array here...
  arrGender: Array<Gender>;
  arrOccupation: Array<Occupations>;
  arrJobType: Array<JobTypes>;
  arrQualification: Array<Qualifications>;
  arrHobbies: Array<Hobbies>;
  arrMartialStatus: Array<MartialStatuses>;
  arrResidentialType: Array<ResidentTypes>;
  canChange: boolean; 
  canEdit: boolean;
  // You forgot to add the type to the Array here...
  tableHeaders: Array<string>;

  constructor(private pServ: PersonalInfoService) {
    this.canChange = false;
    this.canEdit = false;
    this.tableHeaders = new Array();
    this.person = new Person();
    this.persons = new Array();
    this.arrGender = new Array();
  }
}