如何定义记录类型的默认值

from dataclasses import dataclass, field

@dataclass
class Person:
    name: str = 'Unknown'
    age: int = 0
    email: str = field(default='noemail@example.com')

public class Person {
    private String name = "Unknown";
    private int age = 0;
    private String email = "noemail@example.com";

    // Getters and setters...
}

public class Person
{
    public string Name { get; set; } = "Unknown";
    public int Age { get; set; } = 0;
    public string Email { get; set; } = "noemail@example.com";
}

const person = {
    name: 'Unknown',
    age: 0,
    email: 'noemail@example.com'
};

interface Person {
    name?: string;
    age?: number;
    email?: string;
}

class DefaultPerson implements Person {
    name = 'Unknown';
    age = 0;
    email = 'noemail@example.com';
}

type Person struct {
    Name  string
    Age   int
    Email string
}

func NewPerson() *Person {
    return &Person{
        Name:  "Unknown",
        Age:   0,
        Email: "noemail@example.com",
    }
}