22、TypeScript 对象与类的深入探索

TypeScript 对象与类的深入探索

1. 处理对象

在 TypeScript 中，编译器通过检查对象是否定义了形状中的所有属性来匹配对象的形状，并且不关心多余的属性（定义对象字面量时除外）。以下是一个示例代码：

let people: Person[] =
    [{ id: "bsmith", name: "Bob Smith", city: "London" },
     { id: "ajones", name: "Alice Jones", city: "Paris"},
     { id: "dpeters", name: "Dora Peters", city: "New York"}];
let employees: Employee[] =
    [{ id: "bsmith", company: "Acme Co", dept: "Sales" },
     { id: "dpeters", company: "Acme Co", dept: "Development" }];
let dataItems: EmployedPerson[] = correlateData(people, employees);
function writePerson(per: Person): void {
    console.log(`Person: ${per.id}, ${per.name}, ${per.city}`);
}
function writeEmployee(emp: Employee): void {
    console.log(`Employee: ${emp.id}, ${em