题目一

        console.log(+true); // 1
        console.log(!"Andy"); // false

题目二

        console.log(Number(1) === Number(1)); // true
        console.log(Boolean(false) === Boolean(false)); // true
        console.log(Symbol('Andy') === Symbol('Andy')); // false

题目三

        const user = { name: 'Andy', age: 23 }
        const admin = { admin: true, ...user }
        console.log(admin);