类方法的数组中的动态类型

class MyClass {
  constructor(name) {
    this.name = name;
  }

  sayHello() {
    console.log(`Hello, ${this.name}!`);
  }

  sayGoodbye() {
    console.log(`Goodbye, ${this.name}!`);
  }
}

// 创建类的实例和方法数组
const instances = [new MyClass("Alice"), new MyClass("Bob")];
const methods = [MyClass.prototype.sayHello, MyClass.prototype.sayGoodbye];

// 动态调用方法
instances.forEach((instance, index) => {
  methods[index % methods.length].call(instance);
});

function isMethod(obj) {
  return typeof obj === 'function' && obj.prototype instanceof MyClass;
}

const validMethods = methods.filter(isMethod);

const methodCache = new Map();

instances.forEach((instance, index) => {
  const methodName = index % methods.length.name;
  if (!methodCache.has(methodName)) {
    methodCache.set(methodName, methods[index % methods.length].bind(instance));
  }
  methodCache.get(methodName)();
});