TypeScript-类和泛型和ypeScript-接口合并现象

class CaChe<T> {
    arr: T[] = [];

    add(value: T): T {
        this.arr.push(value);
        return value;
    }

    all(): T[] {
        return this.arr;
    }
}

let caChe = new CaChe<number>();
caChe.add(1);
caChe.add(3);
caChe.add(5);
console.log(caChe.all());

interface TestInterface {
    name: string;
}

interface TestInterface {
    age: number;
}

interface TestInterface {
    name: string;
    age: number;
}

interface TestInterface {
    name: string;
}

interface TestInterface {
    age: number;
}

class Person implements TestInterface {
    age: number = 19;
    name: string = 'yby6';
}