04. 声明对象类型

const p: {
    name: string,
    age: number,
    say: (hobby: string)=> void
} = {
    name : 'tom',
    age: 18,
    say(hobby: string) {
        console.log(`my name is ${this.name}, my age is ${this.age}. and i like hobby is ${hobby}`)
    }
}

p.say('play game')