我有两个课:
class A {
name: string;
age: number;
constructor(name: string, age: number) {
this.name = name;
this.age = age;
}
}
class B extends A {
}
我还有一个对象,我想将这些类的实例用作键:
const storage: Storage = {};
所以它看起来像这样:
const a = new A('Neo', 25);
const b = new A('Smith', 31);
storage[a] = 'What are you trying to tell me? That I can dodge bullets?';
storage[b] = 'Never send a human to do a machine's job.'
然后我想通过键来改变值,例如:
const keys = Object.keys(storage);
keys.forEach(key => {
if (key instanceof A) {
console.log('This is Neo');
} else if (key instanceof B) {
console.log('This is Smith');
}
})
外观应该像Storage
一样,因为在打字稿中
索引签名参数类型必须为“字符串”或“数字”