如何在Typescript中声明具有特殊类型的变量

Question

I'm loading a json file and need the fields to have the same name

export interface People{

name: string
age: number
alive?: boolean
}

json comes like this

{
 {
 "name": "teste1"
 "age": 41
 "alive?": true
 }
}

load the json

@Injectable()
export class Peoples{
constructor(private http: Http){}

peoples(): Observable<People[]>{
    return this.http.get(`${DEEP_API}/people`)
    .map(response => response.json())
}
}

My problem is that the Person does not recognize the "?" in the "alive?"

Any suggestion?

Answer 1

If the property name contains special characters you need to put it in ''

export interface People{
    name: string
    age: number
    'alive?': boolean
}

Note alive?: boolean is valid syntax, but it means the property named alive is optional, not that the property is named alive?

To access the property you need to use person['alive?']

Answer 2

要添加@Titan所说的内容，您还应该知道，通过选择在属性名称中使用特殊字符，您将需要使用括号表示法 ["alive?"]来访问该属性值。