Question

我正在努力寻找下面的例子：

var player1= {name: "Chris", score: 1000, rank: 1};
var player2= {name: "Kristofer", score: 100000, rank: 2};

function playerDetails(){
alert("The name of the player is "+ this.name + "."+ " His score is : "+ this.score + "and his rank : "+ this.rank);
}
player1.logDetails= playerDetails;
player2.logDetails= playerDetails;

player1.logDetails();
player2.logDetails();

据我所知player1.logDetails是player1的属性或者player1的方法。所以我无法理解作者如何为一个函数赋予一个属性。另外我不明白为什么你会这样写而不是： player1.logDetails = playerDetails（）; 我尝试过但不起作用。

然后他调用player1.logDetails()这是一个函数，但没有在任何地方声明。（？）

如果有人可以帮忙？提前谢谢

Answer 1

如果代码是这样编写的，我打赌你理解它：

var player1 = {
                name: "Chris", 
                score: 1000, 
                rank: 1,
                playerDetails: function() { alert('The name is '+ this.name) }
};

var player2 = {
                name: "Kristofer", 
                score: 10000, 
                rank: 2,
                playerDetails: function() { alert('The name is '+ this.name) }
};

代码的作者想要定义一次“playerDetails（）”函数。

以简化方式显示此内容的另一种方式是：

var player1 = {
                name: "Chris", 
                score: 1000, 
                rank: 1
};

player1.playerDetails=function() { alert('The name is '+ this.name) }

var player2 = {
                name: "Kristofer", 
                score: 10000, 
                rank: 2
};

player2.playerDetails=function() { alert('The name is '+ this.name) }

因此，如果你想通过只编写一次playerDetails函数来优化上面的代码，它就像你帖子中的代码一样。

如果我编写了代码块，我可能会这样写:(这很容易阅读）

function playerDetailsFunc() {alert('The name is '+ this.name) }

var player1 = {
                name: "Chris", 
                score: 1000, 
                rank: 1,
                playerDetails: playerDetailsFunc
};

var player2 = {
                name: "Kristofer", 
                score: 10000, 
                rank: 2,
                playerDetails: playerDetailsFunc
};

Answer 2

Javascript函数与其他值或对象没有区别你可以将它们分配给你想要的任何东西;你甚至可以将它们作为参数传递。

Answer 3

我自己仍然是个新手，但你可以在对象中创建方法作为替代方法。

var player1= {name: "Chris", score: 1000, rank: 1, logDetails: playerDetails};
var player2= {name: "Kristofer", score: 100000, rank: 2, logDetails: playerDetails};

function playerDetails(){
console.log("The name of the player is "+ this.name + "."+ " His score is : "+ this.score + "and his rank : "+ this.rank);
}

player1.logDetails();
player2.logDetails();

此外，“定义方法”下面的链接可能有助于回答您的问题。 enter link description here

Answer 4

player1.logDetails(player1); player2.logDetails(player2);

Javascript对象将属性分配给属性

4 个答案: