JavaScript:好的部分 - 如何不使用`new`

function createPerson(name, age) {
  const person = {};
  person.name = name;
  person.age = age;
  person.sayHello = function() {
    console.log('Hello, my name is ' + this.name);
  };
  return person;
}

const person1 = createPerson('Alice', 30);
person1.sayHello(); // 输出：Hello, my name is Alice

const person2 = {
  name: 'Bob',
  age: 25,
  sayHello: function() {
    console.log('Hello, my name is ' + this.name);
  }
};

person2.sayHello(); // 输出：Hello, my name is Bob

class Person {
  constructor(name, age) {
    this.name = name;
    this.age = age;
  }

  sayHello() {
    console.log('Hello, my name is ' + this.name);
  }
}

const person3 = new Person('Charlie', 20);
person3.sayHello(); // 输出：Hello, my name is Charlie