下面的程序名称属性是否可以直接通过 me.name 对象更改？

Question

let me = {
    name: "Sina",

    talk: ()=>
    {
      return this.name;
    }, 

    setName: (newName)=>
    {
        this.name = newName;
    }
}

   <console.log(me.name);   //accessing directly thru object output: Sina>
   <console.log(me.talk()); //accessed thru function, output: undefined. **Why undefined???????**>

    <me.setName("Reena");     //passing argument to setName()>
    <console.log(me.talk()); //output: Reena>

    <me.name = "Beena";       // can be changed name property directly like this?>
                        < //**if so, why not displaying Beeba instead of Reena?????**>
    <console.log(me.talk()); //**output: Reena not Beena. why???**>

输出：

Sina
undefined
Reena
Reena>

Answer 1

因为你用了箭头函数，但是他们没有this.

因此，如果您像此处那样更改代码，它将起作用：

let me = {
name: "Sina",

talk: function() {
  return this.name;
},

setName: function(newName) {
    this.name = newName;
}
}

me.setName("Reena");
console.log(me.talk());

me.name = "Beena";
console.log(me.talk());

尝试通过阅读这篇文章来了解有关箭头函数的更多信息： Arrow functions

希望对你有所帮助:)

下面的程序名称属性是否可以直接通过 me.name 对象更改？

Below program's name property can be changed directly thru me.name object or not?

javascript

object

下面的程序名称 属性 是否可以直接通过 me.name 对象更改？

Below program's name property can be changed directly thru me.name object or not?

javascript

object

下面的程序名称属性是否可以直接通过 me.name 对象更改？